Actually taste the rainbow with a vibrant rainbow cake! Learn how to make our Rainbow Layer Cake for the ultimate birthday treat or festive dessert. Use liquid gel or gel-paste food coloring for a deeper, richer color.
Rainbow Layer Cake recipe from Betty Crocker. 2 boxes vanilla cake mix divided and colored with gel food coloring. Idea from comments: Use regular whipped canned frosting for middle layers and Cool Whip refrigerated frosting for the outside.