INGREDIENTS
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3 cups cake flour, (not self-rising)
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2 teaspoons baking powder
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1 teaspoon salt
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1 1/2 cups (3 sticks) unsalted butter, room temperature
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2 1/4 cups sugar
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1/2 teaspoon pure vanilla extract
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1 cup milk
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8 large egg whites
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Seven-Minute Frosting
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1 cup Lemon Curd