Note: If you don’t have a food processor, you can easily make the dough by hand. Start by mixing the flour, salt, and any herbs, spices, or cheese in a large bowl. Cut the cold butter into small cubes and use a pastry cutter or your fingers to work the butter into the dry ingredients until the mixture becomes crumbly. Then, stir in the sourdough discard and slowly add the cold water, one tablespoon at a time, until the dough comes together.