We made this on the grill a few weeks ago and it is now a cook out staple for our family. I usually have compound butter on hand in the freezer so you need to start with that. I make mine with unsalted, room temperature butter and whatever fresh herbs I have on hand at the time (basil, parsley, and chives is a good combination.) Finely chop the herbs and mix them into the butter. Season with salt and pepper and put the butter on some wax paper. Roll it into a log and wrap it up and it will keep in the freezer for quite some time (I would think probably 6 months.) When you're ready to grill corn just put some some thick slices of the butter log onto shucked corn and roll up in foil. Then cook it however you normally grill your corn. Personally, I love it when the corn gets slightly charred and carmelized. The butter melts and the herbs get in between the kernals - very tasty