I have a smores bar recipe that uses it and marshmallow fluff doesn't liquify in the oven, however it will get a lovely golden colour. (bakersroyale.com)
It will become too oily and will become a more liquify cream rather than a thick cream. (keepinitkind.com)
Coconut oil liquifies above 74ish degrees, so in the summer you might need to refrigerate it to keep it firm. (dwellinginhappiness.com)