Just in a natural setting the first thing that would come to my head to get that 'feeling' across would be just the slang 'kick'.
"How would you rate the kick of this coffee?"
I mostly base this off of the fact that it's been a common thing I've said my whole life, to be honest, such as, "Wow there's some kick in this, what did you put in it?" I tend to find it synonymous with 'zest' in a way, except more abrupt and leaning into that it gives you a jolt you weren't expecting.
On that note, for the feeling of this question to be honest I'd say even 'zest' would fit in, as an example: "On a scale of one to ten, how much zest is in the flavor of the coffee?" Saying that out-loud does tend to hit the ear a little wrong for this application, but, it's not out of the ballpark. Technically you'd attribute zest to more of a refreshing kind of taste usually with food, kinda goes with tangy, but just wanted to put it out there in case maybe that's word that would hit the nail on the head for you.
Altogether, if the question could be altered slightly, it seems like if you tossed out: "On a scale of one to ten, how much of a kick does this coffee have?" Running that through a voice-over here a few times for an imaginary interview seems like something a marketing department would eat up, given trendy buzz-style (and often coming across as a forced 'casual' soft-ball Broadcast commercial conversation) word choice.
That aside, if it were you and I sitting across from one another and you just put that out there with 'kick', I'd lock in on exactly what you meant. But, it could entirely just be me, or the area of the U.S. I'm from; the biggest factor that lead me to 'kick' is my experience in Broadcast FM Radio, and having to record commercials for various things. Definitely had a few small cafes or the like in the past buy airtime and toss me a script rather than asking me to come up with it for them. I've used 'kick' in at least one I'm almost 100% positive, but it's been awhile.
Apologies for the long-winded explanation, just wanted to give a decent idea of where my thought process was going with the word choices.
Hope this at least gets some other's thoughts going if nothing else, and I'll toss it around in my head today and see what else I can come up with.