Rainbow Angel Cake
["1 pkg. white angel food cake", "1 tsp. lemon or orange peel, grated", "8 drops green food coloring", "8 drops yellow food coloring", "8 drops red food coloring"]
["Prepare cake as directed on package.", "Add lemon peel.", "Divide batter evenly in 3 bowls.", "Fold 1 color in each bowl of batter. Pour green in ungreased tube pan, spread evenly.", "Repeat with yellow and red.", "Bake and cool as directed."]
["white angel", "lemon", "coloring", "coloring", "coloring"]