Making a little pack of hot chocolate, that looks just like a reindeer when it's finished!
Hot chocolate powder
Chocolate drops (both brown and white for best effect)
Pointed sweet bag / piping bags
Pom poms (for a nose)
Decorate the bag with some eyes and a Pom Pom nose. Draw on a smile with a sharpie.
Fill the food bag with hot chocolate powder, add a layer of chocolate drops, then the other colour, then a layer of marshmallows.
Seal the bag with a rubber band and add a pipe cleaner for extra festiveness