2. In a mixing bowl, combine flour and butter until mixture resembles coarse crumbs. Gradually add ice water, mixing until dough forms. Divide dough in half, shape into discs, and refrigerate for 30 minutes.
3. Roll out one disc of dough and fit into a 9-inch pie dish. In another bowl, mix cherries, sugar, cornstarch, lemon juice, and vanilla extract. Pour filling into crust.
4. Roll out the second disc of dough and place over filling. Trim and crimp edges, and cut slits in the top crust for steam to escape.
5. Bake for 50 minutes or until crust is golden brown and filling is bubbly. Let cool before serving.