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When you cut into this Rainbow cake you get an extra surprise. Not only is the frosting rainbow colored but the cake is too. This makes a fun birthday cake for kids or just a special treat anytime of the year.

The recipe below calls for a cake mix and a can of frosting but you can make most any homemade 2-layer white cake if preferred, along with homemade frosting. Make sure you use white cake and white frosting to achieve the rainbow coloring when adding the food coloring.