INGREDIENTS
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3 cups plus 2 tablespoons all-purpose flour, divided
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1/2 teaspoon baking soda
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1/2 teaspoon salt
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1 cup (2 sticks) unsalted butter, at room temperature
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3 cups sugar
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1 cup sour cream
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6 eggs
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1 teaspoon vanilla
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2 cups blueberries
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powdered sugar, for dusting