To make holly leaves, add 1 or 2 drops of green food coloring to 1/3 of the marzipan and mix until color is throughout. Roll marzipan into a long cylinder. Dust counter with cornstarch. Roll marzipan out flat. With a small, sharp knife, cut marzipan into small diamonds. Or use a small leaf- or diamond-shaped cookie cutter. Remove leaves from counter using a flexible spatula.

To make holly berries, add 1 or 2 drops of red food coloring to a small piece of marzipan. Mix until color is throughout. Roll into tiny balls.