These sourdough discard crackers are incredibly easy to make and are such a treat to have on hand.  This recipe is from Melina Hammer's new book A Year at Catbird Cottage, which she adapted from King Arthur Flour. Melina's recipe calls for 2 tablespoons of finely chopped rosemary, and King Arthur Flour's recipe calls for 2 tablespoons of dried herbs, so feel free to add those if you have them. Having made these several times now, I think there are two places where things can go wrong: Not rolling them out thinly enough. Not baking them long enough. Once I made both mistakes, and the crackers were too thick and not crisp. That said, looking at the photos both on the KAF website and in Melina's book, I think if you want to make them slightly thicker, though no thicker than 1/16-inch thick, you can as long as you bake them long enough — an even golden brown color is the visual cue you are looking for.  Notes:  If you don't have rye flour, you can simply use all all-purpose flour or you can use any other flour you have on hand, such as spelt, or any variety of freshly milled flour, etc.  If you don't have a starter but want to make these, stir together 100 grams water with 100 grams flour in a small bowl the night before you want to bake these. Cover the bowl with a towel and let it rest at room temperature. Use the entire mix as your starter the following day.  If you want help getting started with sourdough bread baking, I have a free email course: Sourdough Demystified.