Preheat oven to 350°. Spray a mini whoopie pie tin and/or mini muffin tins with cooking spray. (Makes about 50 cookie cups.)
Mix cake mix, pudding mix (dry), eggs, and butter on low speed using an electric mixer. Beat until batter comes together, scraping the sides of the bowl as needed. Stir in coconut extract (optional) and coconut.
Scoop tablespoon sized balls into prepared pans. Press to fit. Bake 7-8 minutes, rotating pans halfway through baking. Cool completely before removing from pans and frosting.
Stir one packet Lime Jell-O into one can of frosting. You can simply spread the frosting on the cookies with a knife, and top with toasted coconut and a sprinkle of graham cracker crumbs. Or, use a pastry bag fitted with a 1M tip to pipe the frosting onto the cookies. If you are piping the frosting, you may need a second can of frosting. (I like to add lots of frosting!)