This cozy 16th-century house on one of the stepped streets around the Rathaus might be Baden’s most welcoming restaurant. A couple of low-ceilinged, beamed, candlelit rooms on the ground floor of a similarly charming hotel specialize in local comfort food, of the beef broth with dumplings and bratwurst on braised onion sauerkraut variety. Racks of lamb, duck breasts, and other haute entrees are accompanied by generous portions of gratins and noodles. Service is as polished as the well-burnished wood tables.