In a food processor, grate chocolate.

Transfer grated chocolate to a large mixing bowl.

Mix chocolate with butter and rum with electric mixer until smooth.

Cool in refrigerator until firm.

Spoon out approx. 2 tablespoons of mixture, and roll into a ball in your hand. (apply a small amount of shortening to you hands to help keep chocolate from melting all over you)

Roll each ball in either the sprinkles or coconut snow to finish them.