Take a regular vanilla cake recipe, and add red food coloring to the batter before you bake. Prepare as normal, then ice cake in green. For extra wow- factor, try to make a layer cake and carve them to look like a christmas tree. Place small, name- tagged gifts underneath for any kids- or adults! Your local cooking store, craft store, or just plain old grocery store might sell edible pearls or giant sprinkles, both of which make great ornaments. Place a small sugar cookie star on top. Remember, it's better to have too much icing than too little!