"Cream frosting" refers to a sweet and creamy topping that is often used to decorate cakes or cupcakes. It is made by mixing butter or shortening with powdered sugar, milk or cream, and flavorings such as vanilla. Full definition
The cupcakes themselves are not overly sweet since the only sugar in them is fruit sugar, that's why I love a not - small serving of coconut whipped cream frosting on top. (feastingonfruit.com)