INGREDIENTS
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Cake
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3 cups all purpose flour
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2.5 teaspoons baking powder
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1 teaspoon salt
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1 cup unsalted butter, room temperature
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2 cups sugar
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4 large eggs, room temperature
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1 teaspoon vanilla extract
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1 cup milk
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1 cup chopped, toasted walnuts
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Butterscotch Sauce
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2/3 cup heavy cream (hot)
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1 cup sugar
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4 tablespoons water
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3 ounces unsalted butter, room temperature
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1/4 teaspoon salt
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1 teaspoon vanilla extract
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Candy thermometer
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Duff's Buttercream
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Makes roughly 4 pounds (enough to ice a 3-tier cake)
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10 large egg whites, room temperature
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2 cups granulated sugar
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2 ½ pounds unsalted butter, room temperature