It's a cupcake. No, a cookie that looks like a cupcake. But a zombie cupcake, because it's green and has a bloody bite taken out of it. Do cookies that look like cupcakes have brains?
Those elves in Santa's workshop are so mischievous! This guy snuck into Santa's magic sack of gifts and from the look on his face it appears he's been found out. Don't be too hard on him, Santa! He just wanted to hang out with you!