Indulge in the ultimate treat with these incredible Heath Bar Blondies! Featuring rich semi-sweet chocolate discs, generous chunks of buttery toffee, and the deep, nutty undertones of brown butter, this Blondies Recipe is an absolute triumph. Get ready to bake a dessert that will captivate your taste buds and earn rave reviews!
There’s a special magic that happens when toffee meets a chewy blondie. As a lifelong admirer of toffee, finding new ways to incorporate its buttery crunch into desserts always feels like a victory. This particular recipe elevates the classic blondie to new heights by infusing it with nutty brown butter, which lends an incredible depth of flavor. These toffee-laden Chocolate Chip Blondies are not just for toffee enthusiasts; they’re a dream come true for anyone who loves the soft chewiness of blondies or the comforting familiarity of a chocolate chip cookie. They perfectly balance sweet, salty, and a hint of caramelized goodness in every single bite, making them a sensational addition to any dessert spread.

Why These Heath Bar Blondies Are a Must-Bake
Prepare to fall in love with a dessert that’s simple to make yet delivers extraordinary flavor. These Heath Bar Blondies are more than just a sweet treat; they’re an experience waiting to happen. Here’s why they deserve a spot in your baking repertoire, whether you’re a seasoned baker or just starting your culinary journey:
- Explosion of Flavor and Texture: Each bar is generously packed with substantial chunks of genuine Heath bars and luscious semi-sweet chocolate discs. While those small bagged toffee bits have their place, nothing compares to the satisfying bite and rich flavor of larger, real Heath bar pieces. They melt slightly during baking, creating delightful pockets of buttery, caramelized bliss that perfectly complement the chewy blondie base. The contrast between the soft blondie, the crunchy toffee, and the smooth chocolate creates an unforgettable mouthfeel.
- The Secret of Brown Butter: What truly sets these Brown Butter Blondies apart is the use of brown butter. By gently cooking the butter until the milk solids toast to a beautiful golden brown, you unlock a complex, nutty, and subtly caramel-like flavor (also known as beurre noisette). This simple yet transformative step adds an incredible richness and depth, taking an ordinary blondie and elevating it to an extraordinary level. It’s a game-changer for enhancing the overall flavor profile of any baked good, infusing a warmth that can’t be achieved with plain melted butter.
- Perfectly Chewy and Incredibly Tasty: These blondies strike the ideal balance between a soft, tender interior and wonderfully crispy edges. The moist, dense crumb is a testament to the careful selection of ingredients and precise technique, ensuring every bite is supremely satisfying. Their irresistible taste, combining the sweetness of brown sugar with the unique notes of toffee and chocolate, will have everyone reaching for a second, or even a third, piece. They epitomize the perfect chewy cookie bar.
- Effortless Batch Baking: If you love homemade cookies but dread the tedious process of scooping and baking individual rounds, then bar cookies like these are your new best friend. Simply spread the entire batch of batter into a single pan, bake it to golden perfection, allow it to cool, and then cut it into squares. It’s a significantly more efficient and less fussy way to produce a large quantity of delicious treats, making them perfect for gatherings, school lunchboxes, bake sales, or simply stocking your cookie jar for a week of delightful snacking.
Glowing Reader Endorsement: A Testament to Deliciousness
Don’t just take our word for it! The true measure of a recipe’s success often comes from those who try it. Here’s what one delighted baker, Greg, had to say about these spectacular Toffee Blondies, proving their irresistible appeal:
From Greg: “Kate of Food Babbles linked this recipe in a recent tweet, and I was immediately attracted to it because of the toffee/chocolate combo and the use of browned butter in the batter. I just got back into my own kitchen from a road trip and made these blondies instantly. They’re outrageously good. Great balance of textures and flavors. Next time I’m doubling the recipe and baking it in a 9 x 13 pan. Brava skinny chick!”
Greg’s enthusiastic feedback perfectly captures the essence of this recipe – the irresistible combination of toffee and chocolate, amplified by the nuanced flavor of brown butter. It’s a recipe that inspires immediate baking and promises exceptional results, proving that some treats are simply too good to resist and worth making in a larger batch!

Expert Baking Tips for Achieving Perfect Heath Bar Blondies
Baking is both an art and a science, and a few simple techniques can elevate your Homemade Blondies from good to absolutely phenomenal. Follow these expert tips for consistent, mouthwatering results every time, ensuring your blondies are always a hit:
- Room Temperature Ingredients: The Foundation of Success: For optimal incorporation and a smooth, emulsified batter, ensure your eggs and butter (if not browning) are at room temperature. Set them out on the counter an hour or two before you begin baking. Room temperature ingredients blend more evenly, creating a more uniform batter texture which leads to a superior final product. While the butter in this specific recipe is melted and browned, having room temperature eggs is still crucial for achieving a homogenous mixture without curdling.
- Quality Matters: Real Butter and Vanilla: Always opt for real butter and pure vanilla extract. Imitation vanilla simply can’t replicate the complex aromatic profile of the real deal, which is derived from actual vanilla beans. Similarly, real butter provides superior flavor, a richer mouthfeel, and a better textural outcome that margarine or spreads cannot match. These core ingredients are the backbone of any truly delicious blondie, so don’t skimp on quality.
- Enhance Moistness with an Extra Egg Yolk: Some blondie recipes, particularly those aiming for maximum chewiness and richness, benefit from the addition of an extra egg yolk. The yolk provides additional fat and emulsifiers, contributing to a wonderfully moist, dense, and chewy texture, much like a fudgy brownie. This is a fantastic trick for boosting the decadence factor of your blondies.
- The Role of Cornstarch for a Tender Crumb: Introducing a small amount of cornstarch can subtly improve the texture of your blondies, making them incredibly tender. It works by replacing a portion of the all-purpose flour, thereby reducing gluten development. Less gluten results in a softer, more delicate crumb that practically melts in your mouth. This is a common trick used by professional bakers to achieve that desirable melt-in-your-mouth quality.
- Brown Sugar: The Moisture and Flavor MVP: Using brown sugar, especially dark brown sugar, is paramount for moist and flavorful blondies. The molasses content in brown sugar not only adds a rich, deep caramel-like flavor but also significantly contributes to the chewiness and moisture of the bars. Unlike white sugar, brown sugar attracts and holds moisture, preventing the blondies from drying out and ensuring a wonderfully soft and pliable texture.
- PRO-Tip: Make Your Own Dark Brown Sugar: If your pantry only holds light brown sugar, there’s no need to make an extra trip to the store! You can easily create your own dark brown sugar by adding one tablespoon of molasses to one cup of light brown sugar. Mix it thoroughly with a fork or your hands until the molasses is evenly incorporated. This simple trick ensures you never have to delay your blondie-making plans due to a missing ingredient.
- Avoid Overmixing the Flour: Once you add the dry ingredients, especially the flour, mix until just combined. Overmixing develops the gluten in the flour excessively, which can lead to tough, dense, and cakey blondies instead of the desired soft and chewy texture. A light hand and stopping as soon as no dry streaks remain is key here.
- The Golden Rule: Do Not Overbake: Blondies continue to cook slightly after they are removed from the oven due to residual heat. Overbaking is the quickest way to dry them out and make them crumbly and hard. Look for edges that are set and starting to pull away from the sides of the pan, while the center still looks slightly soft, jiggly, or even a little underdone. This ensures a perfectly chewy and moist interior once cooled, yielding truly perfect Chewy Blondies.

The Ultimate Toffee Blondies Verdict: Pure Perfection!
These Heath Bar Blondies were nothing short of spectacular, truly exceeding all expectations. Each bar offered a delightful symphony of textures: the yielding softness of the interior contrasted beautifully with the slightly crispy, golden-brown edges. But the real magic unfolded with every bite, revealing irresistible pockets of crunchy, buttery toffee alongside creamy, melted semi-sweet chocolate. It’s a textural and flavor masterpiece that will leave you utterly satisfied and craving more.
While my husband, surprisingly, isn’t a fan of toffee (a culinary mystery to me!), he gracefully bypassed these decadent bar cookies, leaving more for the rest of us to enjoy! To ensure I didn’t succumb to the temptation of devouring them all myself, I wisely tucked a generous portion of these toffee-laden cookie bars into the freezer, ready to send a sweet care package to Nick in the dorms. The remaining blondies were eagerly shared with my wonderful knitting friends during our weekly gathering. The instant smiles that lit up their faces when I enthusiastically mentioned “toffee” were priceless. And when I saw them eagerly reaching for seconds of these glorious Heath Bar Blondies, I couldn’t help but smile right back, knowing I’d created something truly special and universally adored.
Frequently Asked Questions About Blondies
Blondies, often affectionately called Blonde Brownies, are a delightful category of bar cookies characterized by the absence of cocoa powder or melted chocolate in their batter. Unlike their chocolatey counterparts, blondies typically derive their primary flavor from rich vanilla extract and the marvelous taste of real butter. Their versatile nature makes them a perfect canvas for a variety of delicious add-ins, such as crunchy nuts, sweet chocolate chips, chewy dried fruits, colorful candies, or, in this case, irresistible toffee chunks, creating a truly customizable treat. They are cherished for their dense, chewy texture and rich, buttery flavor profile, making them a comforting classic in American baking.
The fundamental distinction between brownies and blondies lies primarily in their core flavor and color. Brownies are defined by the inclusion of chocolate (either cocoa powder or melted chocolate) in their batter, which gives them their characteristic deep brown hue and rich chocolate flavor. They often contain a higher proportion of eggs and less flour compared to blondies, contributing to their signature fudgy or cakey texture. Blondies, as previously mentioned, are free of chocolate in the batter, relying instead on the warm, inviting notes of vanilla extract and the nutty nuances of brown sugar and butter for their signature golden color and distinct, caramel-like taste. While both are beloved bar cookies, they offer uniquely satisfying and delicious flavor experiences, each with its own devoted following.
Creating brown butter, or “beurre noisette” as it’s known in French (meaning hazelnut butter), is a simple yet transformative process that significantly enhances the flavor of your baked goods. To begin, melt your butter in a light-colored saucepan over medium heat. As the butter melts, it will begin to bubble and foam. Swirl the pan occasionally to ensure even cooking and prevent burning on the bottom. Initially, the butter will appear cloudy as its water content evaporates, but it will soon clear. Keep a close watch as the milk solids at the bottom of the pan start to toast and darken to a golden brown, and the butter itself turns a beautiful amber color. Once you detect a distinct, wonderfully nutty aroma, reminiscent of toasted hazelnuts, and the butter achieves that desired hazelnut color, immediately remove it from the heat. This quick removal is crucial to stop the cooking process and prevent it from burning. For an extra smooth finish, you can strain the brown butter through a fine-mesh sieve to remove the browned milk solids, though many bakers prefer to leave them in for added texture and intensified flavor. This fragrant liquid gold is now ready to impart its incredible depth to your recipes!
Brown butter is nothing short of delicious, offering a complex and incredibly appealing flavor profile! Its distinctive taste is a direct result of the Maillard reaction, the same chemical process responsible for the irresistible browning and savory notes in seared meats, toasted bread, and roasted vegetables. This reaction fundamentally transforms the animal proteins within the butter, breaking them down into hundreds of new, aromatic flavor compounds. According to culinary experts at tastecooking.com, the resulting flavor is a harmonious blend of sweet, deeply savory, wonderfully caramelly, and distinctly nutty notes. It adds a sophisticated layer of richness and a subtle depth that can elevate everything from baked goods like these blondies to delicate sauces and savory dishes, making it a beloved secret weapon in many kitchens for imparting a gourmet touch.
More Irresistible Bar Cookie Recipes You May Also Like:
If you loved these Heath Bar Blondies, you’re in for a treat! Explore more delightful bar cookie recipes and other toffee-infused desserts that are sure to satisfy your sweet tooth:
- Chewy Oatmeal Toffee Cookies: If you’re a devoted fan of the buttery toffee in these blondies, you’ll adore these satisfyingly chewy oatmeal cookies, generously loaded with even more toffee goodness and a comforting oat texture.
- Butterscotch Blondies with White Chocolate Chips: For another delightful take on the classic blondie, try these butterscotch-flavored bars. They’re studded with creamy white chocolate chips for a delightful twist that’s sweet and utterly irresistible.
- Classic Chocolate Chip Cookie Bars: Sometimes, you just crave the timeless comfort of a classic. These simple yet sensational chocolate chip cookie bars deliver all the familiar, comforting goodness of your favorite cookie in an easy-to-make bar form, perfect for any occasion.
- Explore even more Easy Bar Cookie Recipes: Dive into our extensive collection of hassle-free, crowd-pleasing bar cookies. From fruity to fudgy, these recipes are perfect for effortless entertaining, quick desserts, or simply treating yourself.
Stay connected with us for more delicious recipes and baking inspiration! You can find us on social media: Instagram, Facebook, and Pinterest. Don’t forget to tag us when you bake one of our recipes! We love seeing your culinary creations. And if you’re absolutely thrilled with the results, please consider leaving a 5-star rating in the recipe card below – your feedback means the world to us and helps other bakers discover these fantastic treats!

Irresistible Heath Bar Blondies Recipe
20 minutes
25 minutes
45 minutes
16 servings
Experience the ultimate chewy bar cookies, generously loaded with crunchy Heath Bar chunks and rich chocolate discs!
Ingredients for Heath Bar Blondies
- 1/2 cup (1 stick) unsalted butter
- 1 cup dark brown sugar, packed
- 1 large egg
- 1 teaspoon pure vanilla extract
- 1 cup all-purpose flour
- 1/4 teaspoon salt
- 1/2 teaspoon baking soda
- 1/2 cup Heath bar chunks (from approximately two 1.4-ounce bars, roughly chopped)
- 1/2 cup semi-sweet chocolate chunks or discs
Step-by-Step Instructions for Delicious Blondies
- Preheat your oven to 350ºF (175ºC). Line an 8 x 8-inch baking pan with non-stick foil or regular aluminum foil generously sprayed with nonstick cooking spray, ensuring an overhang on two sides for easy removal. Set the prepared pan aside.
- In a medium, light-colored saucepan, melt the unsalted butter over medium heat. Continue cooking, swirling the pan occasionally, until the butter turns a rich golden brown color and emits a wonderfully nutty aroma. Watch it carefully to prevent burning. This browning process should take about 3-5 minutes.
- Remove the brown butter from the heat and immediately pour it into a large mixing bowl. Add the dark brown sugar. Beat with an electric mixer for a couple of minutes until the mixture is well combined and slightly cooled. Then, add the large egg and beat until the batter appears smooth and creamy. Mix in the pure vanilla extract until fully incorporated.
- In a separate small bowl, whisk together the all-purpose flour, salt, and baking soda. Gradually add these dry ingredients to the wet mixture, mixing on low speed until just combined. Be careful not to overmix the batter at this stage to keep the blondies tender and chewy.
- Gently fold in the chopped Heath bar chunks and semi-sweet chocolate chunks or discs using a spatula. Mix until they are evenly distributed throughout the batter without overworking it.
- Spread the blondie batter evenly into the prepared 8×8-inch pan. Use an offset spatula or the back of a spoon to smooth the top. Bake for 20-25 minutes, or until the edges are golden brown and begin to pull away slightly from the sides of the pan. The center should still look a little soft and slightly underbaked for ultimate chewiness.
- Allow the blondies to cool completely in the pan on a wire rack before lifting them out using the foil overhang. Once fully cooled (this is crucial for clean cuts), cut them into 16 squares to serve and enjoy!
Chef’s Notes & Tips for Best Results
For the smoothest batter and best incorporation, ensure your egg is at room temperature before adding it to the mixture. This helps prevent curdling and creates a more uniform texture.
Remember the golden rule of baking: once the flour is added, mix the batter as little as possible to prevent tough blondies. Mix until just combined, with no dry streaks remaining.
For an extra boost of flavor and to deepen the notes of chocolate and toffee without making them taste like coffee, consider adding an additional 1/4 teaspoon of instant espresso powder to the dry ingredients.
If you don’t have dark brown sugar, you can easily make your own by combining 1 cup of light brown sugar with 1 tablespoon of molasses and mixing well.
Recommended Baking Products
As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.
- Small Offset Spatula
- Nonstick Foil
- 8 x 8-inch Baking Pan
Nutrition Information:
Yield:
16
Serving Size:
1 bar
Amount Per Serving:
Calories: 134Total Fat: 4gSaturated Fat: 2gTrans Fat: 0gUnsaturated Fat: 1gCholesterol: 15mgSodium: 99mgCarbohydrates: 24gFiber: 1gSugar: 18gProtein: 2g
HOW MUCH DID YOU LOVE THIS RECIPE?
Please leave a comment on the blog or share a photo on Pinterest

My fondness for toffee traces back to childhood, to the Homers who lived just around the corner from us. Mary, my dearest friend, lived there, and every Christmas, their family delivered a magical goodie tray to all the neighbors. Mr. Homer’s specialty was always the exquisite toffee, and being the slightly bossy older sibling, I’d stake my claim on every single piece, leaving the fudge and divinity for my sisters. It was a yearly indulgence I eagerly anticipated, a cherished memory woven into the fabric of holiday seasons.
Even now, I keep this cherished tradition alive. To ensure I can continue enjoying this once-a-year luxury (and to avoid eating it all myself!), I typically make three large batches of homemade English toffee to share with friends and neighbors. The key is to get it out of the house as quickly as possible before I’m tempted to devour more than just a couple of shards. However, a secret stash of Heath bars always resides in my pantry, not for eating straight (though that’s certainly tempting!), but specifically for baking into delightful treats like these flavorful Blondies with Heath Bar Chunks.
With a month having passed since my last truly satisfying bite of toffee, it was high time to put my Heath bar stash to good use. I opted for the wonderfully simple yet incredibly rewarding route of making these Heath Bar Blondies. To further enhance their rich, caramel undertones and create an unparalleled depth of flavor, I once again turned to the magic of brown butter, which lends an unmatched warmth and nuttiness to the base. Alongside this, a generous dose of dark brown sugar provided an additional layer of moisture and a delightful molasses kick, contributing to that perfectly chewy texture we all crave. The grand finale? Piling in those chunky Heath bar pieces and luscious chocolate disks, pushing these blondies straight over the top into pure dessert perfection! This recipe isn’t just about making blondies; it’s about recreating a little piece of home, tradition, and pure joy with every single bite.
