A critical review of recent work in microwave freeze drying of food products is presented. This is followed by a general evaluation and recommendation for future work. The major technical problems that would prevent commercial use of microwave freeze drying have been solved. Economic studies show that processing costs for microwave freeze drying are lower than the costs for conventional freeze drying. Thus there has been adequate research and development for commercialization. A discussion is presented for improving the transfer of technology to aid commercialization. Recommendations are made for additional research and development.