I love my coffee too, won't give it up, but since I was 51 it has triggered underarm sweating, sometimes for
hours after a cup. I've been unable to drink coffee after noon since becoming a mum many years ago, as I won't sleep properly if I do, but that morning cup is needed to keep things moving along internally, guaranteed laxative for me, so it's worth the extra sweating just to have that effect! I have a rectocele so it's important not to strain or delay too long.
In reply to your question, it depends on what HRT you use, there are so many different formulations out there, not all of them work for all women.
Since I got oestrogel, I've been able to drink coffee without sweating at all, but bowel movements are now less frequent, so it's an overall lessening of the caffeine effects I guess.
HRT patches didn't work for me at all, placebo would have been better because the patches made me feel worse not better with that damn northisterone in it. When I used patches there was absolutely no difference to my sweating/flushes/night sweats at all.
I found that some types of hrt work better for some symptoms, like oestrogel works for sweating but kills your libido and tibolone gives you for energy and libido but won't help with sweating, they aren't at all similar feeling and I asked could I have a half dose of each, instead of choosing only one.
I was turned down flat with no explanation as usual.
So I chose to start oestrogel, two months ago.
Tibolone could keep my lining safe instead of progesterone which I can't tolerate, but they refuse to give me it
The oestrogel has reduced my overheating/sweating by 90%, however, my skin and hair is getting greasier and I've started flushing in my cheeks for the first time, only started doing that this month and I'm almost three years post meno.
The other six types of HRT I've tried didn't reduce my overheating symptom in any noticeable way, but each had it's own side effects and some intended effects as well.