INGREDIENTS
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2 cups shelled and chopped walnuts
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1-1/4 cup unsalted butter, divided and at room temperature
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3 cups unbleached all-purpose flour
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2 teaspoons baking powder
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1/2 teaspoon salt
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2 cups granulated sugar
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4 large eggs
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2 teaspoons pure vanilla extract
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1 cup 2% milk
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6 tablespoons unsalted butter at room temperature
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6 cups icing sugar
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1 teaspoon pure vanilla extract
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6–9 tablespoons evaporated milk
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30 (approximately) walnut halves, for decoration