You’ll know when blondies are finished baking when the top is golden brown and a toothpick inserted in the center comes out with a few moist crumbs (but not wet batter). You can use cake doneness tests for brownies and blondies, but be careful not to overbake them, or you’ll end up with cakey blondies instead of chewy ones.
Ingredients
1-1/2 cups packed brown sugar
3/4 cup butter, melted
3 large eggs, room temperature
1 teaspoon vanilla extract
1-3/4 cups all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon salt
1 cup white baking chips
3/4 cup chopped walnuts, optional
Directions
Preheat oven to 325°. In a large bowl, combine the brown sugar and butter, whisk until light and fluffy, 8-10 minutes. Add eggs and vanilla just until blended. Combine the flour, baking powder and salt; add to brown sugar mixture. Stir in white baking chips, and if desired, walnuts.
Spread mixture into a greased 9-in. square baking pan. Bake until a toothpick inserted in the center comes out clean, 45-50 minutes. Cool on a wire rack. Cut into bars.