Divide the dough into two portions, weighing 210 grams each. Wrap each portion in plastic wrap and flatten it out into a disc (like you would a pie dough). Chill the dough for 30 minutes or up to 24 hours.
Preheat the oven to 350°F while your dough chills. Line 2 baking sheets with parchment paper.
Lightly flour your work surface, unwrap dough. Place dough on top of flour and lightly flour the top. Using your rolling pin, roll the dough out into a rough rectangle, about 12 by 10 inches in size (you don’t have to be totally exact). (Alternatively, if dough is sticky, you can lightly dust 1 piece of parchment paper with a little bit of flour, place dough on top, flour again and place an additional piece of parchment paper on top and roll dough out in between parchment paper). I had an easier time rolling out on counter, Hannah preferred parchment paper, totally up to you!
Transfer your dough rectangle to one of the prepared baking sheets. (Peel off one piece of parchment paper on top if you used). Using your pastry wheel or pizza cutter, cut the dough into a grid with about 36 to 42 squares. Sprinkle flaky sea salt and herbs (if using), over the dough. Lightly press the toppings into the dough. Prick each square a few times with a fork (this will prevent your dough from rising as it bakes).
Bake for 20 to 25 minutes, rotating halfway through. Your crackers are done when they feel completely dry, and the edges begin to brown slightly. Don’t over bake or your crackers will burn. Sprinkle with the fine sea salt immediately after coming out of the oven..
Let the crackers cool completely, then snap them off along the cut lines. Store crackers in an airtight container at room temperature for up to 1 month.