Preheat oven to 350°F. Line two baking sheets with parchment paper or silicone baking sheets.

In a small bowl, add yeast to water, stir and let sit 10 minutes. Stir until all yeast is dissolved.

In a medium bowl, combine flour and salt.

Using your hands, mix in yeast water and butter until a dough forms.

Knead 5 minutes.

Rest 5 minutes.

Knead 5 minutes.

Cover dough and let rest 10 minutes.

On a lightly floured work surface, roll dough to 1/8 inch thick.

Transfer to baking sheets, and, using a small floured biscuit or cookie cutter, cut out crackers. Remove excess dough.

Dock with tines of a fork, sprinkle with sea salt.

Bake for 20 minutes or until a golden brown.

Let cool on pans.