AKA capsicum annuum.Frozen yellow pepper with cubes dices and slices.Yellow peppers are a common type of pepper used in many foods, including pepper rellenos, pizza and beef kebabs, among many others. Yellow peppers have a mild flavor when raw but can be cooked to embolden their taste. Many people enjoy cooking yellow peppers at high temperatures because the process caramelizes the sugars in the green peppers, resulting in a sweet flavor.