Apple Cranberry Pie

Ingredients (19)

• For the Crust:
• 3 cups, plus 1 tablespoon/14 ounces all-purpose flour
• 1 tablespoon granulated sugar
• 1 1/2 teaspoons salt
• 12 tablespoons unsalted butter (chilled)
• 5 to 7 tablespoons buttermilk (cold)
• 3 teaspoons vanilla extract
• 2 tablespoons milk (or cream, for sealing edge)
• For the Filling:
• 2 (21-ounce) cans apple pie filling (about 4 cups prepared pie filling)
• 1/4 cup light brown sugar (packed)
• 1 teaspoon vanilla
• 1/2 teaspoon ground ​cinnamon
• 1 teaspoon cornstarch
• 1 (14-ounce) can whole cranberry sauce (or about 2 cups homemade cranberry sauce)
• For the Egg Wash:
• 1 egg yolk
• 1 tablespoon milk
• Optional: 1 /4 cup cinnamon sugar (for topping)