― This is my new favorite dessert filling/frosting. I like it much better than a cream cheese frosting, because it doesn't have that sour component. :) ∙ Ingredients: ∙ 1 stick butter, softened to room temperature ∙ ¾ C powdered sugar ∙ 16 oz mascarpone cheese ∙ 1 t vanilla ∙ 1 t meringue powder ∙ Directions: ∙ Cream together butter, powdered sugar, and meringue powder until smooth. Add vanilla and continue to beat. When vanilla is [...].