The marshmallow will add some sweetness to it and help give it a little body for the fruit to stand on without using creams or custards.
Make up a small batch and adjust the fruit %s to match the taste you are going for. This should be a shake-n-vape type of recipe too although I have found that all recipes get better after sitting for a while.
Also, i’d stay away from adding/using Ethyl Maltol or Cotton Candy as they can mute the flavors of the fruits over time. That’s why I use marshmallow as a sweetener instead.
I’m going to have to get myself some of this marshmallow. Seems to be quite a popular concentrate! Would you say there are any other must have in the cupboard concentrates that I should have to hand?