Does peanut butter frosting need to be refrigerated?
It is not necessary to refrigerate this peanut butter frosting. The small amount of milk in the recipe (1/4 cup) is stabilized by the large amount of sugar and considered safe at room temperature for two to three days.
Always refrigerate any cake with a frosting that contains eggs or egg whites. Also be sure to refrigerate any kind of frosting that is whipped-cream based or cream cheese frosting.
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