I ask them to fill it up halfway, then I add "butter," return to the counter to have it filled the rest of the way, and return for a second "butter" round to ensure even coverage.
Yup. Fill with corn halfway, butter, then shake the bag. Fill to the top and butter again. Don't butter with less than half the bag filled or you will soak the bottom and get soggy corn. If the theatre won't do this, go to an independent.
