Unniyappam is a popular sweet snack from Kerala, India. It is made using a batter of ripe bananas, rice flour, jaggery, and coconut. The batter is flavored with cardamom and deep-fried in a special pan called 'appachatti' to give it a crispy outer layer and a soft, fluffy interior. Unniyappam is often enjoyed during festivals and special occasions in Kerala, and it is loved for its unique combination of flavors and textures.