Easy Birthday Cakes: These gorgeous birthday cakes are a snap to make using your favorite cake mix and simple white icing. Natural food coloring is a safe way to color favorite treats. To color white icing, use a few drops of beet juice for a pink hue. Try a smidge of turmeric to give your frosting a pop of yellow or use blueberry juice to add a beautiful aqua tint. Test out these techniques on one of our cake recipes!