Ingredients
- ⅓ cup ice water, plus extra as needed
- 3 tablespoons sour cream
- 2 ½ cups (12 1/2 ounces) all-purpose flour
- 1 tablespoon sugar
- 1 teaspoon salt
- 16 tablespoons unsalted butter, cut into 1/4-inch pieces and frozen for 15 minutes
- ¾ cup (5 1/4 ounces) sugar, plus 1 teaspoon for topping
- 5 tablespoons (1 1/4 ounces) cornstarch
- ¼ teaspoon salt
- 20 ounces (4 cups) blackberries
- 2 tablespoons lemon juice
- 2 tablespoons unsalted butter, cut into 1/2-inch pieces
- 1 large egg, lightly beaten
Personal Notes
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