- 2 1/2 cups all-purpose flour, plus more for surface
- 1 teaspoon salt
- 1/4 cup sugar, divided
- 3/4 cup (1 1/2 sticks) unsalted butter, melted
- 1 teaspoon ground cinnamon
- 1 tablespoon apple cider vinegar
- 1 1/2 pounds ripe yellow peaches (about 3–4 medium)
- 2 pints raspberries (about 4 cups)
- 1 cup sugar
- 6 tablespoons cornstarch
- 2 teaspoons vanilla extract
- 1/4 teaspoon salt
- 9″ pie pan (not deep dish)
- Whisk 2 1/2 cups flour, salt, and 1 Tbsp. sugar in a large bowl. Drizzle in butter. Stir just to combine but do not fully incorporate. Texture should be crumbly with some large clumps.
- Transfer 1 1/4 cups (loosely packed) crust mixture to a medium bowl; add cinnamon and remaining 3 Tbsp. sugar. Knead with fingertips until well-combined but still crumbly with a few pea-sized pieces remaining. Freeze until ready to use.
- Add vinegar and 2 Tbsp. cold water to remaining crust mixture. Stir to form a dough, then transfer to a lightly floured surface and knead a few times until the texture is smooth. Transfer to pie pan and press into bottom and up sides with a flat-bottomed measuring cup. Crimp edge with a floured fork, if desired, and freeze while you prepare the filling.
- Position 1 rack in bottom third and 1 rack in center of oven; preheat to 425°F. Place a foil-lined rimmed baking sheet on bottom rack to preheat.
- Slice peaches into 1/4-inch-thick wedges, then transfer to a large bowl. Add raspberries, sugar, cornstarch, vanilla, and salt and toss well to combine. Fill pie crust with fruit mixture, then sprinkle with crumb topping.
- Place pie on preheated sheet and bake until crust begins to turn golden, 20–25 minutes. Rotate sheet, move to center rack, and reduce oven temperature to 350°F. Continue to bake pie until crust is golden brown and thickened juices are bubbling, 35-45 minutes more; cover crust with foil or a pie shield if it begins to darken too much before juices are bubbling. Cool on a wire rack at least 2 hours to allow juices to set before slicing.
- Pie dough and crumb topping can be made and frozen for up to 3 months; thaw before using.