Mix the butter until smooth, add in marshmallow fluff, and slowly add in 1 cup of powdered sugar. Add a tablespoon of milk, vanilla, and food coloring. Add additional sugar or milk until you've reached the desired frosting consistency. It should be thick and hold a spatula upright.

Transfer the frosting to a piping bag fitted with a Wilton 1A tip (or any large open tip). Pipe on the frosting in three circles on top of half of the brownie squares. Place them into the freezer for 15 minutes.

Melt the chocolate chips in a deep mug or bowl for 30 seconds at 70% power. Stir and repeat. Let the chocolate sit and continue to melt before trying to melt it again in the microwave. When the chocolate is smooth and slightly cooled, take your brownies out of the freezer.

Holding the base of the brownie, dip the frosting in a straight up and down motion in the melted chocolate. Give it a little shake to get rid of the excess, then add the cherry to the top while they are still wet. Set them aside to dry and harden.

Add some frosting to the other brownies and top with the high hat brownie.