Preheat oven to 400°F.

Line two baking sheets with parchment paper or silicone baking mats.

In the bowl of a food processor, mix flour, sugar, salt, and rosemary with few pulses.

Put the butter chunks over the surface, and pulse until you have a coarse crumbly mixture.

While the processor is running, drizzle in the vanilla and the water.

Let the processor run until a ball of dough forms and rides on top of the blade.

On a lightly floured work surface, using about 1/2 of the dough, roll out until it is about 1/16 of an inch thick.

Use a knife and cut out 1×1 inch squares, and use the tines of a fork to dock the crackers.

Place the crackers on a baking sheet, and bake for about 10 minutes or until starting to brown.

Repeat with remaining dough.