Preheat the oven to 350°F (180°C) and line a baking sheet with parchment paper.
In a food processor, add the flour, cheddar cheese, nutritional yeast, hemp hearts, and cold butter. Pulse until the mixture resembles coarse crumbs.
Add the cold water, one tablespoon at a time, just until the dough starts to form a bit. It will still be crumbly.
Transfer the dough to a bowl or surface and knead to form it into a ball. Cover with saran wrap and place in the fridge for ten minutes.
Remove the dough. On a lightly floured surface, roll it out until about ¼-inch thick.Use a small fish-shaped cutter (or any small cutter) to cut out crackers and place them on the parchment lined baking sheet. Bake for 12–14 minutes, or until the crackers are lightly golden and crisp. Be careful not to over cook them, they can burn quickly!
Let cool completely on the baking sheet, they will continue to crisp as they cool.