Preheat your oven to 350 degrees F and line 2 cupcake pans with cupcake liners.
Prepare your cake mix by mixing together the cake mix, oil, and eggs as directed on the box.
Mix in a few drops of green food coloring.
Scoop out the batter into your cupcake liners, filling each cup 1/2 way full.
Bake for 15 minutes and then remove to let cool.
Mix your frosting with green food coloring and scoop into a decorating bag with a star tip at the bottom. Reserve some frosting that is untinted.
Then frost each cupcake from the center working your way out.
Cut the Airhead Extremes into 3.5” pieces and stick each end into the frosting to look like a rainbow.
Place 3 miniature marshmallows onto each side of the rainbow.
Unwrap the Reese’s, leaving it in the brown cup wrapper and then frost the top of the Reese’s cup with the untinted frosting.
Sprinkle the gold sprinkles onto the frosting until covered and set onto the frosted cupcake by the rainbow.