An unripe banana is a fruit that has not yet reached its full maturity. It is typically green in color and has a firmer texture compared to a ripe banana. The taste of an unripe banana is more starchy and less sweet, often described as slightly bitter or astringent. The peel can be harder to remove, and the fruit inside is less soft and creamy. Unripe bananas are rich in resistant starch, which acts more like fiber in the digestive system. They are often used in cooking, particularly in savory dishes in various cuisines around the world.