"Nutella frosting" refers to a sweet spread made from Nutella, a popular chocolate hazelnut spread. It is used as a topping or icing on desserts like cakes, cookies, or cupcakes, adding a delicious chocolate and nutty flavor. Full definition
They went over in a big bad way, and left everyone happily brushing cookie crumbs off their clothes and wiping nutella frosting off their faces. (veggieandthebeastfeast.com)
I love a vanilla cake, and nutella nut that I am, I love nutella frosting even more! (aclassictwist.com)