The invention provides a microwave oven having an integral mixing assembly for agitating food inside of the microwave chamber during cooking. The mixing assembly includes a mixer shaft which is received through the top microwave chamber wall and which is capable of rotational movement. The mixer shaft is powered for rotational movement by a motor. The end of the mixer shaft disposed inside of the microwave chamber is adapted for releasable connection to one or more stirring or agitating means. A belt drive system and support mechanism are provided to control rotation of the mixer shaft.
