- 10 Tbsp unsalted butter
- 1 1/4 cups light brown sugar
- 1 large egg, at room temperature
- 2 tsp vanilla extract
- 1/4 tsp salt
- 1 cup plus 2 Tbsp flour
- 1/2 cup toffee bits
- 2/3 cup semisweet chocolate chips
- flaky salt, for topping
- Preheat oven to 350°F and line an 8-inch square baking pan with parchment paper. Cook butter in a heavy saucepan over medium heat, stirring constantly until it foams, turns clear, and then turns a deep brown, about 6 minutes. Pour brown butter into a medium bowl and let cool to room temperature.
- Add brown sugar to bowl and whisk until smooth. Whisk in egg, vanilla, and salt until combined. Fold in flour just until incorporated, then fold in toffee bits and chocolate chips. Scrape batter into prepared pan and use a piece of parchment paper coated with nonstick spray to press batter evenly into pan; tap pan sharply to remove air bubbles.
- Bake for 26 to 30 minutes, until golden and set in the middle, and a toothpick inserted in the center comes out clean or with a few crumbs attached. Sprinkle with flaky salt and cool completely in pan on a wire rack. Just before cutting, chill in the freezer for 10 minutes. Carefully lift parchment to remove bars from pan and place on a cutting board; cut into squares with a sharp knife.
Keywords: Chocolate, Toffee, Brown Butter, Blondies, Bars