This recipe was inspired by Martha Stewart's Brown-Butter Toffee Blondies. The brown butter and toffee give tons of rich flavor to the blondies.
Preheat oven to 350°F. Butter a 9"x13" baking pan and line with a piece of parchment, leaving excess hanging over the sides. Lightly grease the parchment with baking spray.2.
In a small saucepan, over medium heat, melt the butter.3.
Continue to cook the butter until it turns golden brown; be careful to not burn the butter.4.
Remove from the heat and cool completely.5.
Meanwhile, in a bowl, combine the flour, salt and baking powder; whisk to combine.6.
In the bowl of a stand mixer, combine the brown butter, light brown sugar and sugar and beat with the paddle attachment until well combined.7.
Beat in the eggs, one at a time, allowing each to be fully incorporated into the sugar mixture before adding the next.8.
When all eggs are incorporated, and the vanilla and beat on medium-high speed until light and fluffy, about 3 minutes.9.
Add the flour mixture and mix on low, until just combined.10.
Fold in the toffee bits.11.
Transfer the batter into the prepared baking pan and bake for 35-40 minutes, until a toothpick comes out clean when inserted into the center of the blondies.12.
Cool completely on a wire rack.13.
Use the excess parchment paper to pull the blondies out of the baking pan.14.
Cut into 12 bars.