INGREDIENTS
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1 cup butter, room temperature
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1 1/2 cups granulated sugar
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2 eggs
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2 teaspoons vanilla
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1 cup sour cream
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1/2 teaspoon kosher salt
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1 teaspoon baking powder
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1 2/3 cups flour
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1 1/2 cups blueberries (fresh or frozen and thawed)
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2 tablespoons butter, melted
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1 1/2 cups powdered sugar
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1/2 teaspoon vanilla
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1-2 tablespoons milk