Brown Butter Apple Blondies
2 Tablespoons brown sugar
1/8 teaspoon ground cinnamon
1 cup (226g) unsalted butter
2 1/3 cups (291g) all-purpose flour
1 1/2 teaspoons baking powder
1/2 teaspoon salt
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
1 2/3 cups (330g) packed light or dark brown sugar
2 large eggs, at room temperature
1 and 1/2 teaspoons pure vanilla extract
4 Tbsp. (56g) unsalted butter
1 1/2 cups (180g) confectioners’ sugar
2 Tablespoons (30ml) milk
1/4 teaspoon pure vanilla extract
Method
To simplify this recipe I highly recommend browning the butter for the blondies and icing first thing. You can brown the butter for both the blondies AND the icing together. Once it’s all browned, set 4 Tablespoons (2 liquid ounces, or 60ml) aside for the icing in step 8. The rest (8 liquid ounces, or 240ml) is for the blondie batter.
Brown the butter: Slice the butter into pieces and place in a light-colored skillet. (Light colored helps you determine when the butter begins browning.) Melt the butter over medium heat, stirring constantly. Once melted, the butter will begin to foam. Keep stirring. After 5–8 minutes, the butter will begin browning and you’ll notice lightly browned specks begin to form at the bottom of the pan. You will smell a nutty aroma. Once browned, immediately remove from heat, pour into a heat-proof bowl, and set aside until ready to use.
Prepare the apples: Return the browned butter pan to the stove. (No need to rinse out!) Add the apples, maple syrup/brown sugar, and cinnamon. Stir and cook over medium heat until apples have slightly softened, about 3–5 minutes. Set apples aside.Preheat oven to 350f. Line the bottom and sides of a 9×13-inch baking pan with parchment paper, leaving an overhang on the sides to lift the finished blondies out (makes cutting easier!). Set aside.
Make the blondies: Whisk the flour, baking powder, salt, cinnamon, and nutmeg together in a large bowl. In a medium bowl, whisk 1 cup browned butter, brown sugar, eggs, and vanilla extract together. Pour the wet ingredients into the dry ingredients and stir until combined. Fold in the apples. Batter will be quite thick. Evenly spread batter into prepared pan. Bake for about 35 minutes or until the top is lightly browned and a toothpick comes out *mostly* clean. Remove from the oven and allow the blondies to cool completely in the pan set on a wire rack.
Brown butter icing: Heat the remaining 1/4 cup (4 Tablespoons) of brown butter in the microwave for a few seconds since it has likely solidified by now. Whisk in confectioners’ sugar, milk, and vanilla extract. If needed, add more confectioners’ sugar to thicken or more milk to thin out. Drizzle over cooled blondies, then cut into squares.
**Cover and store leftover iced blondies at room temperature for up to 2 days or in the refrigerator for up to 1 week.