As Martha Stewart explains, “This dessert gets its apple-pie-like flavor from cider vinegar, a technique used in covered wagon days, when fresh produce was scarce.” The cooks in Buffalo Bill’s day would have been familiar with this recipe. Don’t miss reading more about those days in Presenting Buffalo Bill by Candace Fleming.
- 2 tablespoons all-purpose flour plus more for surface
- 2 tablespoons unsalted butter
- 1⁄2 cup light-brown sugar
- 1⁄2 teaspoon ground cinnamon
- 1⁄2 teaspoon ground ginger
- 1⁄6 teaspoon freshly grated nutmeg
- 1⁄4 teaspoon salt
- 2 tablespoons cider vinegar
- 1 cup plus 1 teaspoon water divided
- 3 large eggs divided
- 1 tablespoon turbinado sugar or sanding sugar
- Vanilla ice cream for serving
- Roll out 1 disk of dough into a 12-inch round on a lightly floured surface. Fit into a 9‑inch pie plate, and trim edge of dough to rim. Roll out remaining disk of dough to a 12-inch round. Transfer to a parchment-lined baking sheet, and refrigerate, along with dough in pie plate, until firm, about 1 hour.
- Preheat oven to 350 degrees. Melt butter in a bowl set over a saucepan of simmering water; remove from heat. Whisk in brown sugar, flour, spices, salt, vinegar, and 1 cup water. Lightly beat 2 eggs, and whisk into mixture. Return bowl to pan of simmering water, and cook, stirring often, until mixture is thick enough to coat the back of a spoon, 10 to 12 minutes. Remove from heat, and let cool to room temperature, about 20 minutes, stirring occasionally.
- Pour filling into crust, and place top crust over filling. Trim excess, leaving a 1/2‑inch overhang. Fold under bottom crust. Press to seal, and crimp as desired. Beat remaining egg with remaining teaspoon water; brush top of pie with egg wash, and sprinkle with turbinado sugar. Use a sharp knife to slash 6 vents radiating out from center of pie. Bake pie until golden and surface has puffed, about 45 minutes. Let cool on a wire rack 45 minutes. Serve slightly warm with ice cream.
Adapted from http://www.marthastewart.com/939300/pioneer-vinegar-pie