Mix cake mix and bake according to package directions.
When fully baked, remove from oven and let cool 15-20 minutes.
Meanwhile, mix Jello with boiling water; then add cold water, mixing well.
Poke top middle of each cupcake with fork, 4-5 times.
Slowly pour 3-4 spoons of Jello mixture over middle of each cupcake, careful to not let it run over the sides.
Allow cupcakes to finish cooling.
Mix all ingredients for buttercream frosting.
Top each cupcake with frosting.
Serve and enjoy!