A vending machine system for loading and dispensing pre-baked unpackaged food including a fixed cartridge disposed in a refrigerator of a vending machine, and a transport cartridge adapted to removably attach to the fixed cartridge, the transport cartridge operable for holding trays of unpackaged food and loading the trays of unpackaged food from the transport cartridge into the fixed cartridge, wherein, when the transport cartridge is removably attached to the fixed cartridge, a front opening of the transport cartridge aligns with a front opening of the fixed cartridge, and wherein the rack of the transport cartridge aligns with the conveyor system of the fixed cartridge such that trays of unpackaged food within the transport cartridge can simultaneously be transitioned from the rack to the conveyor system.