Bake your favorite cake. Cover with chocolate ganache. Place on a real Lego board.
Color white marzipan using yellow food color. Keep a little white marzipan for later use. Roll and cut out the eyes.
Place on cake.
Clean up powder sugar stains with a damp cloth. Add white pupils using marzipan.
Use green Fondant rectangle for top ninja hat. Use a rolled piece for the nose mask.
Use another rectangle fondant for bottom mask.
Clean up any powder sugar with damp cloth.