Instructions. 1  Place 1 to 4 ears of corn in the microwave: Arrange 1 to 4 ears of corn, un-shucked, in the microwave. 2  Microwave for 3 to 5 minutes: For just 1 or 2 ears of corn, microwave for 3 minutes. 3  Allow to cool: Set the ears on a cooling rack or cutting board to cool.