It’s a bit difficult when you have to choose between two options that you haven’t really tried.
Source: https://www.seattlesbest.com/recipes/coffee-ice-cream-floats-recipe
Coffee with ice cream? I know there are such “cocktails” around Europe and many people tend to enjoy that when summer heat kicks in. Of course coffee has to be cooled down, otherwise it would melt the ice cream. That’s not how you want your ice cream probably, although there are people who will like this. After all you’ll end up with a coffee flavored ice cream I would not call this ice cream coffee.
Coffee and liquor? I think this is the option for me. Although I haven’t tried this combination, there are some coffee varieties that undergo a fermentation process.
Source: https://perfectdailygrind.com/2017/07/how-does-fermentation-affect-coffee-flavour-development/
This controlled fermentation gives them a very distinctive taste nuances like whiskey or rum, or chocolate liqueur. I’ve tried some coffees like this, and they seem prety interesting and rich in taste. All of this leads me to the opinion, that coffee would fit pretty well with some nuts liqueur.
One thing is sure… Coffee goes well with everything that has some sweet taste and coffee flavor really compliment well some desserts. So either choice you make, u you oh probably will be happy.