Banana must be the most popular plant in Kerala and you will see more types of bananas in Kerala Banana chips are the mother of all chips in the world, and all other chips are mimic and one day they may have to pay a royalty on the original idea if the inventor of Banana chips files a patent.Banana chips in Kerala, sweet, salted, spicy, crunchy, munchies etc. They are locally called nenthra-kaaya oopperi or upperi. .Banana chips are a wonderful snack to take on a hike or to serve to your guests with drinks.