Welcome to the Research and Development Department here at Kit Kat. Not long ago, my team and I were asked to take Kit Kat Chunky and make it taste even more delicious. Well, we think we've cracked it, with Peanut Butter Chunky. Try one today, and if you don't agree, you can punish us in any way you wish. Should we be punished? You decide at peanutchunky.co.uk.