The present disclosure describes air-based fryer lids. The air-based fryer lid may include a main housing having one or more side walls, wherein within the main housing resides: a heating element, one or more fan members, a drive member, and a controller; and an oval-shaped base coupled to the main housing and comprising an air discharge opening, the base being sized and configured to cover and form a seal with a container of a slow cooker when placed on the container, wherein the heating element is configured to heat air of an air flow provided by the fan member, and wherein the fan member is configured to guide the heated air through the air discharge opening of the base and into the container of the slow cooker.