Named for its long-time owner, who cooked almost to her last day at age 95 in 2009, this perennially booked, graffiti-covered restaurant serves oodles of oversized schnitzel, made with pork or veal. A serving of the breaded and golden fried meat, paired with Oma’s famous mushroom sauce and potatoes, is so large it can barely fit on the plate. Pull up a seat at one of the small wooden tables for a classic Cologne night out.