Heat oven to 350⁰F. Lightly spray a 24-cup mini cupcake pan with non-stick cooking spray.
In a large bowl, stir cookie mix, egg, butter, and black food dye until dough forms.
Place one tablespoon dough into 18 cups. Press dough ½ up sides.
Bake 9-11 minutes or until edges begin to crisp and become darker in color. Cool for 10 minutes then remove from pan to cool completely.
Stir in 4 drops of green food dye into frosting. Using a cookie scoop or tablespoon, scoop a small amount of frosting onto the cookie cup.
Dip frosting tops into sprinkles and top with candy eyes.