Rainbow Cupcakes 

• 1 (15.25oz) box white cake mix.
• Ingredients for cake mix as stated on box (Use only egg whites if that is an option. ...
• Red, Orange, Yellow, Green, Blue, and Purple Food Coloring/Gel.
• 1 recipe The BEST Cream Cheese Frosting (link in instructions below)
• 1/2 (8oz) tub whipped topping (Cool Whip)