INGREDIENTS
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2 1/2 cups all-purpose flour, plus 1 teaspoon for blueberries and zest
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2 teaspoons baking powder
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1/2 teaspoon salt
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1 cup (2 sticks) unsalted butter, room temperature
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1 cup packed light-brown sugar
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1 cup granulated sugar
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4 large eggs
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1 teaspoon vanilla extract
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1 cup sour cream
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2 cups blueberries
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2 tablespoons grated lemon zest
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Glaze:
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1/4 cup lemon juice
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2 1/2 cups confectioners' sugar