Yes, fava beans and lima beans can be used interchangeably in most recipes. However, there are a few key differences to look out for when trying to discern between the two types of beans. Generally speaking, fava beans have a nuttier flavor and are more expensive than lima beans. They also tend to be larger and have a slightly different appearance (fava beans typically have a thicker skin and lighter color than limas). If you’re ever unsure about which bean you’re looking at, it never hurts to ask your local grocer – they should be able to help you out.