Frittenwerk is a popular German fast-casual restaurant chain specializing in gourmet fries and Canadian-style poutines. Originating in Düsseldorf and expanded across Germany (including locations in Dortmund at Kampstraße and Westenhellweg), Frittenwerk serves house-cut fries topped with rich gravies, slow-cooked meats, cheese curds, guacamole, and creative vegan or vegetarian toppings.