Pop the cake into the freezer for 5 minutes to allow frosting to harden up a bit. With the remaining icing, separate it out into 7 bowls for coloring the rainbow colors. You’ll need the most ...

Divide and color the batter, evenly divide the cake batter into six bowls. Add a few drops of different food coloring to each ...

Leftover cake/cupcakes Leftover frosting Whipped cream Chocolate syrup More from Lifestyle When you make a cake (like this rainbow cake), cupcakes, or really, any sort of baked treat, often there ...