In the bowl of a stand mixer, add the dry ingredients and mix. Then mix in the wet ingredients to form a soft dough. If the dough is too wet, then add a bit more flour. Refrigerate the dough for one or more hours.
After refrigerating, roll the dough to as thin as you desire, around 1/8″.
Sprinkle parmesan over the entire dough, as well as black pepper, and carefully press it into the dough using the rolling pin. Then poke holes with a fork all over the dough, then cut to desired shape with a sharp knife or pizza cutter.
Carefully transfer the crackers to a lined baking sheet, then bake the crackers at 350°F for 15-18 minutes or until golden brown and enjoy!
Notes
You can substitute the parmesan for your favorite cheese or cheese combination.
Be sure to use plenty of flour when rolling out the dough to avoid the crackers sticking to the counter.
This recipe makes several crackers, so I like to use two large baking sheets at once to cut down on the time it takes to bake all of them.
If you want a more rustic looking cracker, you can bake the dough without cutting it into cracker shapes, then break it apart once they've baked and cooled.
Store these homemade sourdough crackers in an airtight container on the counter for up to a week.