INGREDIENTS
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1 1/2 cups all-purpose flour
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1 cup sugar
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1 tablespoon baking powder
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1/4 teaspoon salt
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1/2 cup unsweetened cocoa
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3/4 cup chopped walnuts
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3/4 cup buttermilk
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3 tablespoons unsalted butter, melted
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1 1/4 cups packed light brown sugar
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1 teaspoon ground cinnamon
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1 3/4 cups boiling water
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Whipped cream or ice cream, optional