I recommend fresh, whole ears of corn. Peel the husks back and remove them, pick out the corn silks, and lightly brush olive oil on each ear of corn. If you don't have access to fresh corn that you can then grill (or don't have a grill), I suggest using fire-roasted frozen corn. If you have a Trader Joe's in your area, they have a good one. Or check your regular grocery store's freezer cases and select a fire roasted option. My least favorite option for this recipe is canned corn - although there are some fire-roasted canned corn options that are better than just "regular" canned corn. I don't love the flavor of canned corn however if that's your only option, it will still "work" and the recipe will turn out.