INGREDIENTS
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1 cup Diamond chopped walnuts
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8 Tbsp (1 stick) unsalted butter, softened
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1 1/3 cups granulated sugar
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2 1/4 cups cake flour
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1 Tbsp baking powder
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1/4 tsp salt
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2 Tbsp pure maple syrup
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4 egg whites
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1 1/4 cups milk
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6 Tbsp unsalted butter
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6 ounces cream cheese, softened
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2.5 cups powdered sugar
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1/4 cup pure maple syrup
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1/2 Tbsp vanilla extract