"This is the best buttercream because it is not sickeningly sweet or overly rich like many buttercream frostings, is fluffy and silky smooth, pipes out......"
INGREDIENTS
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3 sticks (12 oz, 336 gr) unsalted butter, room temperature
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8 oz (224 gr) mascarpone cheese, room temperature (*see note for substitution)
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1/4 cup (2 fl oz, 59 ml) heavy cream, room temperature
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1/4 tsp salt
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2-4 cups (9 oz-18 oz, 252 gr-5o4 gr) powdered sugar (also known as icing sugar or confectioners sugar)