Place a piece of parchment paper or wax paper on the counter to spoon mixture onto.

Melt butter in a medium (3 L) saucepan over medium heat.

Add marshmallows and a few drops of green food colouring to get the green you want. Stirring constantly, heat until the marshmallows are heated through. When ready, the mixture will change from a blob of marshmallow to a creamy consistency.

Remove from heat and add cornflakes. Stir until cereal is evenly coated.

Using greased tablespoons and working quickly, drop mounds of mixture onto parchment paper. You can shape the mounds as needed with your hands.

Add a few sprinkles and red gummy berries to top of mounds.