For the best freeze-dried dough starters, visit Sharon Donaldson-Arnold�s Great Basin Sourdough Starter Company. While there pick up her self-published sourdough cookbook, The Sourdough Cook in Buckaroo Country, which features recipes and photos by the author. Sharon actually produces this yogurt-based dough starter from a bread culture that is more than three decades old. You can find the book and starter kit at the Nevada Museum Gift Store or by calling or emailing Sharon at [email protected].