Preheat oven, prep baking sheet, and make cookie crust:
- Preheat oven to 375°F. Lightly splash a 15-by-10-inch rimmed baking sheet evenly with water, then line with parchment paper. In a large bowl, stir together cookie crumbs, sugar, and butter until combined.
Credit: Brie Goldman Press cookie crust in baking sheet:
Evenly press onto bottom and up sides of prepared baking sheet. Bake, rotating halfway through, until firm, about 10 minutes.
Credit: Brie Goldman Cool crust: