We haven't made these in years - I think I was in High School the last time - but I decided to do it.
1/4 cup of Butter, softened
8 oz of powdered sugar
1 T heavy cream
1/2 t of mint extract
you just work all the ingredients, except the food dye, together into a ball, work with your hands this goes fast. Split the dough into two batches mix in green and red food coloring one in each. Roll into balls and lay out on a tray to dry over night. Ideally two. We are putting a fan on them over night to help this along as we should have started it last night.