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These Brown Butter Blondies are chewy, fudgy, and loaded with warm, nutty butterscotch flavor in every bite. The brown butter, soft pecans, melty milk chocolate, and rich brown sugar come together in a way that feels cozy and indulgent — like the very best parts of a cookie bar and a blondie rolled into one.
Why this recipe is so delicious: it starts with nutty brown butter, uses both molasses and corn syrup for the perfect chewy-fudgy texture, and adds pecans sautéed right in the butter for deep flavor and incredible chew. A sprinkle of flake salt brings everything into balance.
If you love cozy, from-scratch bar desserts, you’ll also enjoy my Brown Butter Brownies, Buckeye Brownies, Brownie Bites, and Caramel Brownies — all longtime reader favorites.
Let’s bake something wonderfully warm and toasty. 💛
✨ Before You Begin
✨ Brown butter requires attention. It goes from perfect to burnt in seconds — stay close and keep scraping the bottom of the skillet so the milk solids brown evenly.
✨ Dry milk powder is your secret weapon. It adds extra milk solids to the butter, creating deeper, richer brown-butter flavor without adding extra liquid.
✨ Sautéing the pecans is worth it. They soften just enough to become chewy inside the blondies but still stay toasty and flavorful.
✨ Mix by hand. Overmixing develops gluten and makes blondies cakey instead of fudgy.
✨ Chocolate chunks melt better than chips. They disappear into the blondies and enhance the butterscotch instead of standing out.
✨ Don’t skip the flake salt. It’s optional… but it’s really not. It balances the sweetness and brings the flavors alive.
Brown Butter Blondies Ingredients + Key Notes
This is just a quick look at what you’ll need. For exact measurements and the full ingredient list, head down to the recipe card below.
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All-purpose flour – Gives structure and chew; cup-for-cup GF flour works too.
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Kosher salt – Enhances flavor; use ½ the amount if using table salt.
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Baking soda – Reacts with the acidity in brown sugar to create a chewy, fudgy texture (not cakey).
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Milk chocolate chunks – Melt more thoroughly than chips and complement the butterscotch flavor.
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Light brown sugar – Adds moisture, chew, and butterscotch notes.
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Pecans – Added directly to the butter so they toast and soften at the same time.
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Unsalted butter – Browning creates nutty depth and richness.
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Dry milk powder – Adds additional milk solids for deeper brown-butter flavor.
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Molasses + corn syrup – Combined for a chewy texture with balanced butterscotch sweetness.
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Eggs – Bind ingredients and provide moisture.
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Vanilla – Enhances the caramel and butterscotch flavors.
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Flake salt – Provides contrast and crunch on top.
⭐ Pro Tips
⭐ Watch the butter closely. Brown butter transitions from perfect to burnt incredibly fast — pull it from the heat the moment it reaches deep pecan color.
⭐ Scrape every browned bit. The dark speckles in the pan are pure flavor. If they’re black, the butter has burned — start fresh.
⭐ Use a light-colored skillet if you have one. It makes it easier to see the color change while browning butter.
⭐ Mix by hand. Overmixed blondies become cakey; gentle mixing keeps them chewy and fudgy.
⭐ Sprinkle salt before baking. It adheres beautifully and melts just slightly into the warm blondies.
⭐ Let them cool fully. This is when the chewy, fudgy texture develops.
🔬 Baking Science: The Magic of Brown Butter
Browning butter is simply the browning of milk solids. By adding dry milk powder, you increase the number of milk solids available to toast, which amplifies that incredible nutty, caramelized flavor. Molasses provides acidity (which activates baking soda), chewiness, and deeper butterscotch notes, while corn syrup helps create that gooey, soft-center texture blondies are known for.
How to Make Brown Butter Blondies
A quick, cozy walkthrough
Whisk together your dry ingredients and chocolate chunks. Brown the butter with pecans and dry milk powder until the milk solids reach a deep pecan color, then immediately pour the mixture over your brown sugar. Mix in the molasses, corn syrup, eggs, and vanilla until smooth, then fold in the dry ingredients just until combined. Spread into your parchment-lined 9×13 pan, sprinkle with flake salt, and bake until the center deflates and springs back lightly. Cool completely, lift out, slice, and enjoy every gooey, nutty square.
Storing, Freezing, and Make-Ahead Tips
Storing
- Keep blondies in an airtight container at room temperature for 3–4 days. They stay wonderfully soft thanks to the molasses and corn syrup.
Freezing
- Freeze individually wrapped squares for up to 3 months. Thaw at room temperature or microwave briefly.
Make-Ahead
- Bake fully, cool completely, slice, and store airtight. These blondies actually taste better on day two as the flavors settle and deepen.
Food Safety
- If you’d like more info on food safety, check out this link.
✦ Frequently Asked Questions
✦ Do I need to sauté the pecans first?
No extra step needed — add them right to the butter. They’ll toast and soften perfectly during the browning process.
✦ Should I use a mixer?
No. Hand-mixing keeps the blondies chewy instead of cakey.
✦ How do I know if the butter is browned enough?
Look for deep pecan-colored milk solids and a nutty aroma. When in doubt, pull early — under-browned butter is far better than burnt.
✦ Should the flake salt go on before or after baking?
Before baking so it melts into the top just slightly and adheres properly.
✦ What if my brown bits turn black?
That means the butter burnt. Unfortunately, it can’t be salvaged — start over with a clean skillet.
Still have questions? Drop them in the comments — I love helping you cook with confidence! 💗
More Cookie Bar Recipes
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Thanks for stopping by my kitchen today — happy cooking, friends! 💗 Kathleen
Brown Butter Blondies
Ingredients
- 2 1/4 cups all-purpose flour
- 1 1/2 teaspoons kosher salt
- 1 teaspoon baking soda
- 1/2 cup milk chocolate chunks
- 1 3/4 cups light brown sugar
- 1 1/2 cups pecans coarsely chopped
- 12 tablespoons unsalted butter
- 2 tablespoons dry milk powder
- 1/4 cup molasses
- 1/4 cup light corn syrup
- 3 large eggs
- 2 tablespoons vanilla
- 2 teaspoons flake salt
Instructions
- Preheat oven to 350°F (177ºC). Prepare a 9x13-inch pan with parchment paper along the bottom and sides of the pan. Coat with non-stick spray.
- In a medium-sized bowl, whisk together flour (2 1/4 cups), salt (1 1/2 teaspoons), baking soda (1 teaspoon), and chocolate chunks (1/2 cup milk). Set aside.
- Add brown sugar (1 3/4 cups) to a large heat-resistant bowl. Set aside.
- In a medium-sized skillet over medium-high heat, add the butter (12 tablespoons) and the chopped pecans (1 1/2 cups). Stir slightly until the butter is completely melted, about 3–4 minutes, then add the dry milk powder (2 tablespoons).
- Stir continuously with a silicone spatula, breaking up chunks of milk solids into smaller pieces. Continue to stir and scrape the edges of the skillet until the milk solids are a deep, rich brown, resembling the color of the pecans, about 3–4 minutes.
- The milk solids will turn from pecan to black quickly, so continuously scrape the pan’s bottom with the spatula and keep a close eye on it.
- Once the milk solids are a pecan color, immediately remove the butter from the heat and pour it over the brown sugar in the large bowl. Scrape all the yummy browned bits into the bowl as well.
- With a silicone spatula, stir the hot butter into the brown sugar. Add the molasses, corn syrup, eggs, and vanilla. Stir vigorously with the spatula until smooth. Then, add the dry ingredients. Mix just until incorporated. Pour the mixture into the prepared 9x13-inch pan. Smooth the top. Sprinkle with flake salt.
- Bake at 350°F (177ºC) for 30-35 minutes, or until the center has deflated and when touched, bounces back slightly.
- Let cool at room temperature. When cool, remove the blondies from the pan using the parchment paper and cut them into 24 squares with a large knife. Serve at room temperature.
- To freeze, wrap each square in plastic wrap or store it in a sealed container for up to 3 months.
Notes
- Watch the butter closely. Brown butter transitions from perfect to burnt incredibly fast — pull it from the heat the moment it reaches deep pecan color.
- Scrape every browned bit. The dark speckles in the pan are pure flavor. If they’re black, the butter has burned — start fresh.
- Use a light-colored skillet if you have one. It makes it easier to see the color change while browning butter.
- Mix by hand. Overmixed blondies become cakey; gentle mixing keeps them chewy and fudgy.
- Sprinkle salt before baking. It adheres beautifully and melts just slightly into the warm blondies.
- Let them cool fully. This is when the chewy, fudgy texture develops.
I love these blondies so much! The browned butter was easy to do and added an amazing flavor. The pecans! Yum! They add a fun texture but not too crunchy! I ate way too many of these when I made them! It was worth it!! ♥️♥️
Im so happy you enjoyed these Kim! We love them at our house. Thanks so much for leaving a comment. It helps our community of bakers and cooks and I really appreciate the 5 star rating <3.