"Swiss Buttercream is the quickest way to a silky buttercream frosting that both spreads beautifully, and pipes well. You can flavor it with any extract you choose; or see the tips below for flavor ideas...."
INGREDIENTS
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1 1 1/4 cups sugar
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1 1/2 cup (3 large) egg whites
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1 1/8 teaspoon salt
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1 2 cups (4 sticks) unsalted butter, at room temperature