How to Make It
Grease and flour 3 quarter-sheet pans; set aside. Prepare cake mix according to directions on the box. Spit batter into three equal amounts, adding red and blue food coloring to two of the batter portions. Baking according to package directions. Allow to cool before removing from pans, flipping them onto a wire rack
Use a 1 ½ inch circular cookie or biscuit cutter to cut out circles from each cake layer. If there are any browned bottoms, remove with a serrated knife. Using a jumbo straw, remove a small circle from the middle of the white and red cake circles.
Using a layer of frosting to adhere, stack a white cake circle on top of a blue cake circle. Attached a red cake circle on top of the white cake circle with another layer of frosting. Fill the hole in the middle of the white and red cake circles with Pop Rocks. Put a frilled toothpick or piece of red licorice lace in the center of each cake stack. Prepare within 1 hour of serving, so Pop Ricks have maximum effect.