- 2 sticks butter, softened
- 1 7-oz. jar marshmallow creme
- 3 cups powdered sugar
- ¼ cup tonic water
- Chocolate chips, for garnish
Using a hand mixer, beat butter and marshmallow until fluffy, about 3 minutes. Add in half of the powdered sugar and the tonic water and beat until smooth. Add remaining powdered sugar and beat until smooth and fluffy, another 3 minutes. Pipe immediately on baked and cooled cupcakes and garnish with chocolate chips for eyes.