Preheat oven to 350 degrees. Line a muffin pan with cupcake liners.
In a large bowl, combine the chocolate cake mix, butter, milk, eggs, and butter/vanilla emulsion with a hand mixer on low until ingredients are just combined. Beat on medium speed for 1½ minutes.
Fill liners about ⅔ full (do not overfill!). Bake for 18-20 minutes. Frost when cooled. Place colored coconut in a small bowl and dip cupcakes upside down into coconut so it adheres to the frosting.
To make the frosting, cream together the softened butter and powdered sugar until fluffy. Mix in the marshmallow fluff and vanilla extract on low until combined.
To make colored coconut: Place coconut in a large plastic bag. Add a couple drops of pink food coloring (I used gel). Shake and knead the bag until color is evenly distributed. Add more color, if desired.
Notes
Cupcake base recipe adapted from TidyMom, frosting recipe from Lil Luna.
Recipe by Not Your Momma’s Cookie at https://notyourmommascookie.com/2013/06/sno-ball-cupcakes/