In the work bowl of a food processor, pulse together graham cracker crumbs, hazelnuts, and cocoa nibs until finely ground. Add butter, and pulse until mixture comes together.
Press mixture into bottom and up sides of 2 (14x41/2x1-inch) tart pans. Bake for 8 minutes. Remove from oven, and let cool on a wire rack.
Recipe by Victoria at https://victoriamag.com/mascarpone-mousse-tart-cranberry-orange-chutney-recipe/