Cumin helps give the low FODMAP guacamole recipe some extra kick. Since red onions are left out of this recipe to keep it from going over the acceptable FODMAP limit, spices like salt and pepper are used in their place to help give it some flavor and boldness. Not everyone will like the taste that cumin adds, so it’s not a necessary ingredient. If you do decide to add it, you only need a very small amount, as a little goes a long way here. Be careful not to overdo it, and you can look forward to a well-balanced blend of spices in your guacamole.