Preheat the oven and line cupcake tin with desired cupcake liners. Set aside.
Prepare the box cake mix according to package directions and bake according to package directions.
Allow to cool fully before decorating.
Cones:
Hold a waffle cone on one finger and spray with Wilton food color spray. I used black, but you can also use purple, green or orange. Place them into a cone baking rack to dry.
When dry, using the frosting tubes and a fine tip, create a buckle and decorate with other Halloween sprinkles or embellishments, if desired. Wear food safe gloves to prevent your hands from also becoming Halloween colors.
Frosting:
In a large mixing bowl, beat the butter until smooth. Add the powdered sugar, heavy cream and vanilla extract and blend until smooth and thick.
Divide the frosting evenly. Add 3-4 drops (or until it reaches the desired color) of purple food gel to one batch and repeat with the second batch using the green food coloring. Orange and black are also good choices. Or you can do just one color.
If doing two colors, use a two-toned frosting bag, putting each color on one side and pipe onto cupcakes using a large star tip.
Top each with a decorated waffle cone watch hat.
If you've tried this recipe, come back and let us know how it was in the comments or star ratings.
Notes
You can also buy two tubs of premade frosting and mix the gel food colors right in the tub. You will need two or three if you make all 18 cupcakes.