In a large bowl, mix and knead the melted butter, sourdough discard, and flour until a smooth, non-sticky dough forms. Add up to two tablespoons of extra flour as needed.
Divide the dough into two pieces. Wrap each with plastic wrap and refrigerate for 30 minutes, or up to 2 days.
Preheat your oven to 350°F
Roll the dough on a piece of parchment paper to about 1/16 inch thick. Cut into rectangles with a knife, pizza cutter, or bench scraper. If desired, prick each piece with a fork to prevent puffing.
Lift the parchment with the dough onto a baking sheet. Sprinkle with your desired seasonings. Bake 20-25 minutes until golden and crisp on the edges.
Nutrition information is calculated using an ingredient database and should be considered an estimate.