"Old-fashioned blackberry cobbler with layers of flaky pastry and juicy tart blackberries. Perfectly sweet and tart and wonderful topped with ice cream..."
INGREDIENTS
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1 double pie crust recipe ((see link in NOTES))
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1 cup granulated sugar
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1 to 2 tablespoons cornstarch ((see notes))
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⅛ teaspoon ground cinnamon
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1 cup boiling water
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4 cups blackberries
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juice of ½ lemon ((if needed to add tartness))
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1 tablespoon cold unsalted butter, (cut into small cubes)
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1 egg, (lightly beaten)
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coarse sugar for topping