Make the cupcake mixture according to the directions on the box. Pay attention to the bake time listed on the box as well as this can vary depending on the type. Put them in the oven and bake.
Grab a large bowl and mix together the butter, confectioners’ sugar, cocoa powder, and milk. Mix well.
Next, add in the red food coloring to the buttercream mixture and mix until color changes.
Put the frosting into a piping bag with a #12 tip. Top each cupcake once they are cooled.
Divide the black fondant into spheres that are about 3/4 inches in length. Make certain that you make 24 of them.
Take the spheres and mold them into a cylinder that is about 1 inch long and 1/2 inch wide.
Make one end pointed and give it a curve upwards.
Put two of the shapes on each cupcake for the horns.