Separate the cream cheese frosting (make your own or buy from a tub at the store) into two bowls.
Dye one bowl green and one orange (or whatever fun Halloween colors you like!)
Put 1/4-1/3 cup of each frosting color into a plastic bag and press the frosting to one corner. Snip the tip of the corner off of the bag and pipe a large circular blob in the middle of the cookies.
Evenly press down the unwrapped chocolate candy kisses into the center of the cookie.
Pour a small amount of sprinkles around the frosting on the cookies.