Heat oven to 375ºF (190ºC) with rack set in middle position.
Whisk 1 egg yolk, 1 tablespoon cream, and 1 teaspoon vanilla together in bowl.
Process 1 ¼ cups flour, ½ cup sugar, and ¼ teaspoon salt in food processor until combined, about 5 seconds. Scatter 8 tablespoons chilled butter over top and pulse until mixture resembles coarse cornmeal, about 15 pulses.
With processor running, add yolk mixture and process until dough just comes together, about 12 seconds.
Form dough into 6-inch disk, wrap tightly in plastic wrap, and refrigerate 1 hour. (Dough can be wrapped tightly in plastic and refrigerate for up to 2 days or frozen for up to 1 month. If frozen, let dough thaw completely on counter before rolling.)
Let chilled dough sit at room temperature for about 10 minutes, roll dough out to a 11-inch circle on lightly floured surface. Loosely roll dough around rolling pin and gently unroll into a 9-inch tart pan with removable bottom, letting excess dough hang over edge. Ease dough into pan by gently lifting edge of dough with your hand while pressing into corners and fluted sides of pan with your other hand (make sure edges are about 1/4-inch thick).
Run rolling pin over top of pan to remove any excess dough.
Wrap dough-lined pan loosely in plastic, place on a large plate, and freeze until dough is chilled and firm, about 30 minutes. (Dough-lined tart pan can be wrapped tightly in plastic and refrigerated for up to 2 days or frozen for up to 1 month.)
Adjust oven rack to middle position and heat oven to 375°F (190ºC). Set dough-lined tart pan on baking sheet, discard plastic and line with a double layer of aluminum foil, covering edges to prevent burning; fill with pie weights. Bake crust until golden brown and set, about 30–40 minutes, rotating pan halfway through baking.
Remove weights and foil and continue baking crust for an additional 5-10 minutes until deeply golden brown.
Transfer tart crust to a wire rack and let cool completely.