3 Ways to BBQ Corn on the Cob. My favorite #2 - Shuck corn, discard silk and husk. Wrap corn in heavy duty aluminum foil, with or without a flavored butter or oil inside. Grill directly on hot coals, or on top of a grate set over the coals, turning occasionally until fully cooked, about 15 minutes. This is easy to serve and the foil will keep the corn hot for a long time, making this a good method to use for large gatherings or buffet-style service.