How to Make a Colorful Rainbow Sheet Cake
Guests are going to swoon after seeing the first slice of this rainbow cake. Here’s how to make ourrainbow cake recipe, including the most delicious homemade buttercream frosting. Ingredients 2(16.25 oz. Credit: Rachel Marek Grease pan with nonstick spray and line with 1 sheet of parchment. In a medium bowl, prepare cake batter according to package directions. Divide batter evenly into 3 bowls (you should have about 1 1/3 cups batter per bowl)....