INGREDIENTS
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1/2 pound (2 sticks) unsalted butter, at room temperature
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1 cup powdered sugar
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1 teaspoon vanilla extract
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13/4 cups all-purpose flour
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Pinch of salt
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11/2 cups granulated sugar
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Juice of 1 lemon
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1/4 cup heavy cream
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12 tablespoons (11/2 sticks) unsalted butter, cut into pats
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2 tablespoons rock salt (for eating- not for melting the ice on the driveway!)