Editor’s Tip: No special tools are required to make that white stripe. Simply toss half of the raspberries in a bag with powdered sugar, then alternate them with the rows of red berries. A pastry bag of vanilla icing can help you make the stars on the blueberries. Editor’s Tip: Top the cake with fresh raspberries to make a festive red, white, and blue dessert. Editor’s Tip: For an extra crackle of heat, add a pinch of cayenne pepper to the batter.
