boxes white cake mix
Blue gel food coloring
Red gel food coloring
12oz tubes of whipped vanilla frosting
1. Preheat oven to 350F. 2. Mix one box of cake mix w/2 egg whites & 1.5c Sprite; divide evenly among 3 bowls. 3. Create three shades of blue: Add 2 drops of coloring to one bowl, 4 to the second, and 8 to the third. 4. Coat three 9" cake pans w/cooking spray; line bottoms with parchment paper cut to size. Pour each batter into its own pan. 5. Bake for 15-20 minutes, or until a toothpick comes out clean. Let layers cool; remove from pans. If needed, use a serrated knife to trim tops so they are level. 6. Place darkest blue layer on a plate; cover with a thin layer of frosting. Repeat with remaining layers, from darkest to lightest. Chill cake in fridge. 7. Repeat step 2. 8. Add one drop of blue coloring to one bowl and one drop of red to another. Do not tint last bowl. 9. Repeat steps 4 and 5. 10. Keep building cake with blue, then white, then red layers, frosting after each. Chill cake in fridge. 11. Repeat steps 2-5 using red coloring instead of blue. 12. Keep building cake with red layers, going from lightest to darkest, frosting after each. 13. Coat outside of cake with a thin layer of frosting. Chill for 15 minutes. 14. Use remaining frosting to generously coat outside of cake. Chill for at lest one hour before cutting.