First, make two cakes, one white and one dark chocolate (not regular chocolate)
Cake mixes will be divided into 4 containers. 1 white, 1 chocolate, 1 white with a dab of chocolate and some green food coloring paste and one white and chocolate in equal amounts.
It'll look like this when you mix it up: Light brown, camo green, white, and dark brown
Use an easy method for making pastry bags:
And fill 'em up!
Put random blobs of different batters in to cupcake liners (note, this is NOT the final product. Jon thought it was and was freaked out):
Bake at 350 for about 15 minutes and they come out like this:
And ice away!