This German Sourdough Bread recipe combines wheat and rye flour to create a crusty, airy loaf reminiscent of authentic German bakery bread. Enhanced by the addition of sautéed onions, this beginner-friendly recipe offers straightforward steps and a perfect balance of flavors and textures. Featuring a long resting and proofing period, this bread yields a deeply flavorful sourdough with a tender crumb and crisp crust, ideal for sandwiches or enjoying with butter.