Preheat Oven: Preheat oven to 325 degrees F.

Combine Ingredients: To a mixing bowl, add all dry ingredients excluding coarse salt and ground pepper and whisk until well combined. Add beaten egg and, using hands, knead together until all ingredients are fully incorporated.

Prepare Parchment Paper To Roll Dough: Spray two pieces of parchment paper with cooking spray. Lay one piece down, cooking spray side up, then place dough in center. Lay the other piece down, spray side down so that it touches the dough, and lightly press down so that the parchment adheres to the dough.

Roll Dough: Using a rolling pin, roll dough into an even layer about 1/8 inch thick (the dough should be quite thin). Remove and discard the top piece of parchment paper. Carefully slide a baking sheet beneath the parchment paper with the dough on top.

Cut Dough Into Crackers: Using a pizza cutter or knife, gently cut lines through dough into your desired size of crackers (if using a knife, it seems to work best to press the knife down and bring it back up after each cut, rather than slicing straight through). Sprinkle coarse salt and pepper on top of dough.

Bake: Bake crackers until golden brown, 15 to 18 minutes. Remove crackers from oven and allow to cool completely on the baking sheet, about 12 minutes, before breaking apart and eating.