Mix all together. Shape into balls (a small ice cream scoop can be used to keep the balls uniform). Place balls on wax paper-lined trays and freeze. Place in freezer containers when frozen solid.
On the night of the party, remove balls from freezer and place them on parchment-lined cookie sheets. Let them thaw on the trays for about 20 minutes. (This is not an exact science, they don't need to thaw completely.)