Tie-dyed both inside and out, this treat will suit your partiers to a tee. For the complete Tie Dye party, click here.
Prepare the cake batter according to the directions on the box. Stir the sprinkles into the finished batter and bake as directed in a 13- by 9- by 2-inch pan.
Allow the cake to cool completely. Remove the cake from the pan, cut and arrange it as shown above, then frost it entirely.
Cover your work area and then, following the directions on the decorating-spray bottle, spray blue circles on the cake. Next, spray yellow rings around the blue circles. Finish decorating the cake by covering the rest of the white frosting with the red decorating spray.
Don't forget to decorate the sides too. Makes 16 servings.