"American Flag Cake Recipe This flag cake makes a terrific patriotic dessert recipe for Memorial Day or 4th of July. This flag cake starts with a cake mix, so it's easy, but feel free to use a homemade cake if you prefer. Be sure to use fresh blueberries and raspberries for this patriotic cake recipe. The frozen berries will bleed all over the cake. For a change of pace, try making this cake a patriotic poke cake, with red, white and blue inside...."