INGREDIENTS
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1 cup dark brown sugar
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2 3/4 cups all-purpose flour
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1 cup cold unsalted butter (2 sticks), cut into tiny cubes
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1 large egg, at room temperature
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1/2 teaspoon salt
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Zest and juice of one small lemon; divided
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5 cups fresh blueberries
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1/2 cup + 2 tablespoons white sugar
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4 tablespoons cornstarch
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1 tablespoon crystalized ginger, chopped