Jello poke cake

white cake mix
green jello
red jello
cooking spray

Make cake mix according to directions on back. Let cool completely.
Take a toothpick, or fork, and poke holes into each layer of the cake.
Mix jello with only the hot water and don't let it gel. You'll need to use it immediately.
Pour one color of jello on each cake layer, allowing it to soak in. DO NOT use all of the jello-just enough to color each layer.
Allow to set for about an hour.
Remove from pans.
Instead of icing, use whipped cream as the frosting. Sprinkle with holiday sprinkles. Keep refrigerated until time to serve.

NOTE: I have also done this in a 9x13 inch pan and still used both colors and it turned out just as well. Plus, you don't have the hassle of layering the cake.