Also on these boards
Beyond Corn: What Else Can You Cook in a Cooler
"If you want to cook corn for the masses, Bon Appetit suggests a dead simple, ingenious method: "cooler corn." Basically, fill a large, clean cooler with loads of corn on the cob and pour two kettles-full of boiling water over the corn, then close the top. 30 minutes later, your corn will be perfectly cooked."
Corn on the Cob for a Crowd aka Cooler Corn. Wash out a cooler. Put in a bunch of ears of corn (shucked and silked). Pour enough boiling salted water into the cooler to cover the corn. Close the lid and wait 30 minutes. Open the lid and the corn will be perfectly cooked. The corn will supposedly remain at the perfect level of doneness for a couple of hours.