KITKAT Chunkylaunched in 1999, and is the biggest innovation forKITKATsince its launch in 1935. You can chose your favouriteKITKAT Chunkyflavours from the classicKITKAT ChunkyMilk or mix your break up and pick up a Peanut Butter, or Cookie Dough. If you want an even bigger break, go forKITKAT ChunkyDuo.