Preheat oven to 375°F. Line two baking sheets with parchment paper.
Mix together dry ingredients and cut in butter until crumbly. Add water in batches until soft dough forms, mixing is easiest using hands to work the dough for 2-3 minutes. Let dough rest 15 minutes then divide in half for easier handling.
Lightly flour countertop and roll dough to 1/4-inch thickness and cut into 3-inch rounds.
Place crackers on prepared baking sheets and bake 15-18 minutes.