This Starbucks inspired Hot Cocoa Ornament is an easy DIY to make and will look great on your Christmas tree.
Using the top of the cup as a template, cut out a circle from the cardboard. Paint the top of your cardboard circle with a combination of brown and white craft paint to make it look a little like the light brown hot cocoa color. Allow paint to dry fully. Trim the cardboard circle to fit inside your cup about ½ inch deep. Take care to trim the bottom (unpainted side) a bit more than the top side, this will help it fit into the cup better.
Round over the corners of your marshmallows by hand. Allow clay to dry for at least 24 hours. Paint the clay marshmallows with white paint. Allow paint to dry fully.