INGREDIENTS
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1 1/4 cup all-purpose flour
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2 teaspoons baking powder
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1/4 teaspoon baking soda
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1/2 teaspoon salt
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2 tablespoons unsalted butter, frozen for about 10 minutes
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1/2 cup buttermilk
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2 tablespoons heavy cream
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3 tablespoons Greek yogurt
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1 egg yolk
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1/2 teaspoon vanilla extract
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1 cup blueberries
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4 tablespoons granulated sugar
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1/2 cup confectioners sugar
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2 1/2 teaspoons milk
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1/4 teaspoon vanilla extract