If you really want to stretch your imagination; google "cooking with tea" and you will be surprised at some of its uses. MM is one of those concentrates I find pretty interchangeable. I use it more for a textural contribution vs. an identifiable flavor addition. I have interchanged both FA and TFA without any noticeable difference. Either will add a thicker mouthfeel as well as some sweetness. I have gone more to using Meringue instead/in place of MM. It tends to be a touch lighter in mouthfeel, and does not add as much sweetness. Disclaimer: I have never tried to get an actual "marshmallow" flavor from either of these two concentrates. If you are looking for flavor; please disregard my opinion.