How To Cook Frozen Cauliflower Rice In Microwave. Cook cauliflower rice in the microwave when you need a quick side for dinner, you can just pop your riced cauliflower in a microwavable dish with a lid and cover it. In a large microwave safe mug that can hold at least 14 oz liquid, add cauliflower rice and frozen vegetables.

Put the dish in the microwave uncovered and microwave the rice on the high for 10 minutes. Open bag of frozen cauliflower rice and pour into a microwave safe bowl. Adjust the microwave on high, and run for 2 minutes.