In a bowl, mix the flour, salt, and butter. Use a fork to combine until the mixture resembles crumbs. Gradually add water, 1 tablespoon at a time, until the dough forms and is no longer sticky. If it remains dry after adding 1/3 cup, keep adding small amounts of water until the dough comes together.

Lightly dust your work surface with flour. Roll the dough out until it is about 1/8 inch thick and nearly transparent.

Preheat your oven to 400°F. Place the rolled dough on a baking sheet. Use a pizza cutter to slice it into squares. Prick the dough all over with a fork to prevent bubbling, and optionally, sprinkle some flaky salt on top.

Bake for about 8-12 minutes or until the crackers are lightly golden.