It was still good! I mixed one (brand-new) jar of Nutella with one cup of salted butter and let the mixer run a few minutes until they were well blended. I then added 2 teaspoons of vanilla. After that, I put in 4 cups of powdered sugar, on at a time, mixing after each cup. Then I blended in 2 tablespoons of milk. It was too thick, though. Next time, I'll add more milk.