Abstract: A vent filter for a cooking appliance is disclosed. The vent filter is user-replaceable once it has been spent or its filtration capacity consumed. In disclosed embodiments, the filter is provided in or as part of a cartridge that can be reversibly installed and removed from the appliance without tools. Retention structure is disclosed for holding the filter media in place in a filter receptacle communicating with or formed as part of the exhaust duct of the appliance for air to be filtered. In embodiments, the filter is configured as a recirculating filter to remove odor-causing contaminants, among other contaminants, from cooking fumes before the air from those fumes is recirculated into the kitchen or other ambient environment.