Make batter according to box directions.

Divide batter in half and add red food coloring to 1/2.

Spray 9x13 pans with cooking spray.

Bake each batter in a 9x13 pan for 15 minutes.

Allow both to cool.

Cut 12 circles from each color cake using a 2"-2 1/4" cutter (or wash an empty tomato paste can).

Place alternating red and white cake circles in jar until 4 slices are in place.

Cream butter in a medium bowl

Slowly add in the powdered sugar, and milk as needed, until everything is incorporated and frosting is right consistency.

Add several drops of blue food color and whip a few more minutes to get even color.

Transfer frosting to corner of zippered bag and clip corner to pipe.

Frost cakes.

Melt chocolate by heating in microwave and stirring and repeating until melted and smooth.

Pour melted chocolate out and allow to set until nearly solid.

Cut stars out with a small star cookie cutter and place on top of frosting.