Full-spectrum "fabulous" is the order of the day when you serve this treat at a kid's birthday or half birthday celebration. The colorful cake is a snap to pull together with Betty Crocker™ SuperMoist® vanilla cake mix and gel food coloring.
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.