In a large bowl, combine your marshmallows and butter and heat in the microwave for 1-2 minutes and mix.

Mix in your Rice Krispies cereal until your cereal is evenly covered in your marshmallow mixture.

Grease a 9x13" baking pan and press your Rice Krispies mixture into your pan firmly.

Let set for a few hours and use a large circle cookies cutter to cut out circle shaped Rice Krispies.

In two separate small bowls, mix 1 cup of frosting with green food coloring and one cup of frosting with red food coloring and transfer to decorating bags.

Add another cup of white frosting to a third decorating bag and cut small tips off the ends. 

Use the white frosting to stick a foil wrapped chocolate on top of each Rice Krispies treat Ornaments. 

Use the three colors to decorate the Rice Krispies treat ornaments and top with sprinkles.