Ingredients

  • 1 1/4 cups all-purpose flour, plus more for rolling out the dough
  • 1/4 teaspoon fine salt
  • 5 tablespoons unsalted butter, chilled and cut into small pieces
  • 1/4 cup shortening, frozen and cut into small pieces
  • 3 to 4 tablespoons ice water
  • 1 teaspoon freshly squeezed lemon juice
  • 2 cups granulated sugar
  • 2 tablespoons all-purpose flour
  • 1/2 teaspoon fine salt
  • 1 cup buttermilk, at room temperature
  • 4 large eggs, at room temperature
  • 4 large egg yolks, at room temperature
  • 2 teaspoons vanilla extract
  • 8 tablespoons unsalted butter (1 stick), melted
  • 2 teaspoons finely grated lemon zest (from about 1 medium lemon)

Method

  • Whisk the flour and salt in a large bowl until combined.
  • Add the butter and shortening and toss with your fingers until well coated in the flour mixture.
  • Using a pastry blender or your fingers, cut the butter and shortening into the flour mixture until reduced to pea-size pieces, about 3 to 4 minutes.
  • Drizzle in 3 tablespoons of the ice water and the lemon juice and mix just until the dough comes together.
  • (Add the last tablespoon of ice water if the dough is too dry, but dont overwork the dough or itll become tough.)
  • Form the dough into a flat disk.
  • Wrap it tightly in plastic wrap and refrigerate for at least 1 hour.
  • Lightly flour a work surface and roll the dough out into a round approximately 12 inches in diameter and 1/4 inch thick.
  • Line a 9-inch pie plate with the dough, fold the excess under itself, and crimp the edges.
  • Refrigerate the pie crust until ready to bake.
  • Heat the oven to 350 degrees F and arrange a rack at the lowest level.
  • Place the dough-lined pie plate on a baking sheet.
  • Whisk the sugar, flour, and salt in a large bowl to aerate and combine.
  • Add the buttermilk, eggs, egg yolks, and vanilla and whisk until smooth.
  • Add the melted butter and lemon zest and whisk until smooth.
  • Pour the mixture into the pie plate.
  • Bake until the filling is just set in the middle and the top is golden brown, about 55 to 65 minutes.
  • Place the pie on a wire rack and let it cool to room temperature before cutting.
  • Store tightly covered in the refrigerator for up to 3 days.
  • Return to room temperature before serving.