Place a wet paper towel under and on top of the corn cobs. Microwave on High for 4 minutes.
Remove the paper towel and check to see if the kernels are bright yellow and cooked through on all sides of the cobs. Rotate the cobs and continue to microwave in 2 minute bursts until the kernels are bright yellow on all sides, depending on how many cobs and the strength of your microwave. Cooking 1 to 2 cobs takes about 4 to 5 minutes and cooking 3 to 4 cobs takes about 8 to 10 minutes.