Yes. Increase your cook time to 25-30 minutes at medium high heat. *To freeze whole cobs of fresh summer sweet corn, blanch the cobs for four minutes in boiling water and then drain them and place them in a freezer-quality plastic bag. Sealed and frozen, the ears will keep for six months in a deep freeze. Of course, you can also buy frozen corn a the grocery store, but it doesn't taste nearly as good and can get rubbery fast.