Nutrition values are an estimate. Drain the whole kernel corn well; do not drain the creamed corn. An 8.5 ounce package is one box of Jiffy corn muffin mix. Stir the cornbread mix in gently and stop as soon as the dry spots are gone. The centre should stay soft and slightly creamy, and it firms up as it rests. Leftovers keep in the fridge for 3 to 4 days.