Unripe bananas are bananas that have not yet reached their full ripeness. They are typically green in color and have a firm texture. At this stage, they contain more starch and less sugar compared to ripe bananas, making them less sweet and more starchy. Unripe bananas are often used in cooking, especially in dishes like banana fritters or banana curry. As unripe bananas ripen, they gradually change color from green to yellow, and eventually develop brown spots. This process is due to the conversion of starches into sugars, which enhances their sweetness and flavor. Ripe bananas are commonly eaten raw or used in smoothies, desserts, and baked goods like banana bread.