Grandma's Blackberry Pie

Ingredients

• 1 egg
• 1 teaspoon distilled white vinegar
• 2 ½ cups all-purpose flour
• 2 tablespoons white sugar
• 1 teaspoon salt
• ¾ cup cold unsalted butter, cut into small cubes
• 7 tablespoons ice water, plus more as needed
• + 4 more ingredients
• • 6 cups fresh blackberries
  • 1 apple, peeled and cut into ½-inch thick slices
  • ½ cup white sugar
  • 1 tablespoon white sugar

1. Beat the egg and vinegar together in a small bowl, and set aside. Whisk together the flour, 2 tablespoons sugar, and salt in a mixing bowl. Cut in the cold butter with a knife or pastry blender until the mixture resembles coarse crumbs. (This can also be done in a food processor: pulse the col...

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