Boiled or Grilled corn will remain good for 3 to 4 days in the refrigerator. Before serving, make sure to reheat in a microwave or blanch in boiling water for a few minutes. Garnish and serve! In the freezer, the boiled/broiled/cooked corn can stay good for up to 4 to 6 months if properly wrapped in cling film. Thaw it in the refrigerator for about 24 hours before ready to serve. Blanch in hot water or reheat in a microwave, add any garnish, and serve. If the garnish is already added to the cooked corn, I would recommend consuming it as early as possible. If you have to store the leftovers, then you may refrigerate them for a day and reheat them in the microwave before serving.