Celebrate Memorial Day with this American flag inspired dessert from the creative bakers at King Arthur Flour. These colorful blondies are easy and portable, so double the recipe and use a 9” x 13” pan to please a larger crowd.
8 tablespoons (1/2 cup) unsalted butter
1 cup sugar
1 teaspoon vanilla extract
2 large eggs
1 cup King Arthur Unbleached All-Purpose Flour
1/4 teaspoon baking powder
1/4 teaspoon salt
1/2 cup fresh or frozen blueberries
1/2 cup fresh or frozen raspberries
Hint: Using fresh berries rather than frozen will keep the berries from shedding their juice, which can make bars look muddy.
Preheat the oven to 350°F. Grease an 8″ square pan, line it with parchment paper or foil, and grease the paper or foil. Melt the butter and sugar together. Add the vanilla and let the mixture cool to lukewarm. Mix in the eggs, one at a time. Stir in the flour, baking powder, and salt. Mix until combined, then fold in the berries. Scoop the batter into the prepared pan, and bake for 30 to 35 minutes if using fresh berries; 35 to 40 minutes for frozen, until the edges of the bars just begin to pull away from the pan. Remove from the oven and cool for 20 minutes before lifting carefully out of the pan and setting on a rack to cool completely. Store, refrigerated, for up to 1 week.