Melt butter in a saucepan and add mini marshmallows. Stir until they are all melted and the mixture is smooth.
Remove from heat and add vanilla and enough green food coloring to your liking. Pour mixture over measured cornflakes in a bowl and stir until coated.
Butter a muffin tin and scoop a heaping tablespoon of cornflakes in each cup. Using your finger, make a little hole in the center of the cornflakes to make a wreath.
Add cinnamon candies strategically to look like holly berries. Freeze. Take them out of the freezer just before serving.