In a mixing bowl, combine the white frosting with green food coloring. Mix until the frosting reaches your desired shade of green. You can adjust the amount of food coloring to achieve the perfect vibrant hue.
Transfer the tinted green frosting from Step 1 to a piping bag and snip the end with scissors. Pipe the green frosting onto each baked cupcake in a spiral pattern, creating a decorative top.
Carefully place three candy eyeballs in the center of the green frosting on each cupcake for a fun and spooky look. I like to press them in gently so they stay securely in place.