Buttercrunch Organic Lettuce Seeds 4095. With its very descriptive mouth-watering name, Buttercrunch is a real winner! This is a butterhead type of lettuce with crisp, thick well formed medium to dark green outer leaves hiding an appealing buttery yellow-white heart. Buttercrunch shows good resistant to bolting. Hereâ€™s a tip: for best taste, harvest, clean and take it directly to the table.