Step one: Roll white marshmallow fondant on pre-frosted cake. Light crumb coat will do.
Step 2: Layer pieces of colored shaped fondant on cake. Adhere with a small dab of water. And I mean small. A little goes a long way.
My First attempt at Marshmallow Fondant! This was homemade and delicious. Lots of work and time involved but worth it! Thank you sister for your advise and thank you U-tube for all the step by step instructions on making marshmallow fondant.