Marshmallow Fluff, Creme, or Spread is an American confectionary spread that's very similar to the taste of marshmallows but has a different consistency. It's very light, airy, fluffy, and sweet. it can be used to fill cases, top puddings, or toast, as you would d normal marshmallows. Furthermore, it comes in a jar. Not widely available in the UK, like it is in America, the larger supermarkets are starting to stock it in the condiments aisle. I bought mine in my Sainsbury's supermarket.