INGREDIENTS
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1 1/2 cups all-purpose flour
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1/2 cup unsweetened cocoa powder
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1/2 teaspoon baking soda
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1/4 teaspoon salt
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3/4 cup (1 1/2 stick) unsalted butter, softened
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1 cup granulated sugar
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1/2 cup packed light brown sugar
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3 large eggs
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1 1/2 teaspoons vanilla extract
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1/2 cup (4 ounces) sour cream
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For glaze:
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3/4 cups confectioners’ sugar
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1 1/2 tablespoons milk
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1/2 teaspoon vanilla bean paste or vanilla extract