Blue food coloring (see note)
1 container (12 oz.) white frosting
I personally prefer to use Wilton Icing Colors. For this recipe, I used I "Red - No Taste" and "Royal Blue". I think the colors are more vibrant, however, you may use any kind of food coloring you have it on hand.
Red food coloring (see note)
Red, white and blue sprinkles, optional
1 box (15.25 oz.) white cake mix