Melt and mix marshmallows with butter. This can be done on a stovetop or in the microwave.
Add in Red Velvet Cake mix and stir completely.
Add in Rice Krispies cereal and stir completely.
(optional) add in additional sprinkles.
Spread mixture into a buttered or greased pan.
Once cooled (takes about 30 minutes), spread Cream Cheese icing on top.
Add red sprinkles on top of icing.
Cut and Enjoy!