In a food processor, combine flour, powdered sugar, and salt. Pulse to mix.
Add cubed cold butter and pulse until the mixture resembles coarse crumbs.
Add the egg yolk and 1 tablespoon ice water. Pulse until the dough starts to clump.
Turn onto a floured surface, knead lightly, shape into a disc, wrap, and chill for 30–45 minutes.
Preheat oven to 375°F (190°C).
Roll out dough and fit into a 9-inch tart pan. Trim excess and prick bottom with a fork.
Freeze for 15 minutes, line with parchment and fill with weights.
Bake for 15 minutes, remove weights, and bake another 10–12 minutes until golden. Cool completely.