Brown Butter Maple-Walnut Blondies with Maple Glaze

Why You’ll Love This Recipe

• Brown butter adds deep, toasty flavor that pairs perfectly with maple and walnuts.
• Thin maple glaze soaks in slightly and leaves a delicate sheen—never cloying.
• Chewy centers, glossy tops, and crisp edges with just a pinch of flaky salt for snap.
• One bowl after browning the butter, and freezer-friendly for make-ahead treats.

Grocery List

• Produce: None required.
• Dairy: Unsalted butter; 1 large egg; 1 large egg yolk.
• Pantry: All-purpose flour, light brown sugar, pure maple syrup (Grade A amber or dark), baking powder, fine sea salt, flaky sea salt, vanilla extract, powdered sugar, walnuts, parchment paper.

Full Ingredients

For the Blondies

• 1/2 cup (113 g) unsalted butter
• 3/4 cup (150 g) packed light brown sugar
• 1/4 cup (60 ml) pure maple syrup (Grade A amber or dark for stronger flavor)
• 1 large egg + 1 large egg yolk, at room temperature
• 1 1/2 teaspoons pure vanilla extract
• 1 cup plus 2 tablespoons (140 g) all-purpose flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon fine sea salt
• 1 cup (100 g) walnuts, toasted and roughly chopped

For the Thin Maple Glaze

• 2/3 cup (80 g) powdered sugar
• 3 tablespoons pure maple syrup
• 1–2 teaspoons hot water, as needed for a thin, pourable consistency
• Pinch fine salt

To Finish

• Flaky or coarse sea salt, to taste (start with a generous pinch—about 1/8 to 1/4 teaspoon for the whole pan)

Step-by-Step Instructions

Step 1: Prep the pan and toast the walnuts

Heat the oven to 350°F (177°C). Lightly grease an 8-inch square baking pan and line it with a parchment sling (overhang on two sides for easy lifting). Spread the walnuts on a small sheet pan and toast for 6–8 minutes until fragrant. Cool, then roughly chop.

Step 2: Brown the butter

In a light-colored saucepan, melt the butter over medium heat. Continue cooking, stirring and scraping the bottom, until the milk solids turn deep golden and the butter smells nutty, 5–7 minutes. Immediately scrape every drop and browned bit into a large mixing bowl. Let cool 5 minutes so it is warm, not hot.

Step 3: Whisk in the sugars and eggs

Whisk the brown sugar and maple syrup into the warm brown butter until smooth and glossy. Let sit 2 minutes to cool slightly, then whisk in the egg, egg yolk, and vanilla until the mixture thickens and looks shiny, 30–60 seconds.

Step 4: Add the dry ingredients and walnuts

In a small bowl, whisk together the flour, baking powder, and fine sea salt. Add to the wet mixture and fold with a spatula just until a few dry streaks remain. Fold in the chopped toasted walnuts. Do not overmix.

Step 5: Bake

Scrape the thick batter into the prepared pan and smooth the top. Bake 23–26 minutes, until the top is shiny and set, the edges are lightly browned, and a toothpick inserted an inch from the edge comes out with a few moist crumbs (not wet batter). The center will look slightly underbaked—that’s perfect for chewy blondies.

Step 6: Make the thin maple glaze

While the blondies bake, whisk the powdered sugar, maple syrup, and a pinch of salt in a small bowl. Add hot water, 1/2 teaspoon at a time, until the glaze is thin and pourable, like heavy cream.

Step 7: Cool, glaze, and finish with salt

Cool the pan on a rack for 20 minutes. Use the parchment to lift the slab out and set it on the rack. Drizzle the thin maple glaze over the warm blondies, letting some run over the sides. After 5–10 minutes, sprinkle with a pinch of flaky sea salt. Let the glaze set about 20 minutes before slicing into 16 squares.

Pro Tips

• Use a light-colored pan to brown butter so you can see the milk solids turn deep amber without burning.
• Weigh the flour (140 g) for the chewiest texture; too much flour makes blondies cakey.
• Pull them when the center is just barely set—carryover heat finishes the bake and keeps the middle fudgy.
• Choose dark/robust maple syrup for the boldest maple flavor in both batter and glaze.
• Sprinkle flaky salt after the glaze starts to set so the crystals stay crisp and visible.

Variations

• Chocolate chip twist: Fold in 1/2 cup (85 g) dark chocolate chunks with the walnuts.
• Pecan-maple: Swap walnuts for pecans; add a pinch of cinnamon (1/4 tsp) to the dry ingredients.
• Maple-espresso glaze: Whisk 1 teaspoon instant espresso powder into the glaze for a subtle coffee kick.

Storage & Make-Ahead

Store blondies in an airtight container at room temperature for up to 3 days or refrigerate up to 5 days. For longer storage, wrap bars individually and freeze up to 2 months; thaw at room temperature. Make ahead: Bake and cool completely, wrap the uncut slab tightly, and glaze the day you plan to serve for the freshest finish.

Nutrition (per serving)

Approximate per blondie (1 of 16): 210 calories; 11 g fat; 25 g carbohydrates; 3 g protein; 17 g sugars; 0.5 g fiber; 120 mg sodium.