Directions

1. Whisk together the egg yolk, water and vanilla in a small bowl and set aside in the fridge.
2. In a large food processor, pulse the macadamia nuts until they resemble almond flour. Do not over process. Add the flour, sugar, and salt and pulse to mix. Add the butter pieces and pulse until the mixture resembles cornmeal with a few pea sized butter pieces. Add the chilled egg yolk mix and pulse just until the dough holds together when pinched.
3. Transfer the dough to a work surface, and shape into a rectangle. Wrap in plastic and refrigerate for 30 minutes.