My partner is a teetotaler and I have oral allergy syndrome, which means I am allergic to almost all raw fruit juices.
We want to try making some mocktails that we can both drink that actually resemble cocktails along the lines of an Old Fashioned, rather than glorified fruit punch. However most resources I've been able to find only discuss making very sweet, simple drinks, often using fruit juice as the major ingredient.
What ingredients and techniques that fit our restrictions (non-alcoholic, no raw fruit) will produce mocktails that are on the complex/sharp end of the flavor spectrum?