"Our Favorite Buttercream This ultra-smooth buttercream is not too sweet and is our frosting of choice when we want a silken, elegant texture and delicate flavor. It is based on meringue and a cooke......"
INGREDIENTS
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1 1/4 cups sugar, divided into 1 cup and 1/4 cup
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1/3 cup water
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6 large egg whites, at room temperature
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3/4 teaspoon cream of tartar
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2 1/4 cups (4 1/2 sticks) unsalted butter, very soft, cut into pieces