Do you mean hot as in spicy hot or hot as in warmer than warm?
If spicy hot I tried a few times but can’t recommend - however there are many variables here. For instance, I used vanilla huel and sriracha. Ginger went much better and also I’d love love love to use lemon juice but unfortunately it coagulates the Huel really easily.
Using UU Huel and possibly chilli powder, jerk sauce, some Nando’s sauce or maybe even black pepper your mileage may vary.
I’ve blended both coffee and chocolate Huel for two or three minutes in my vitamix which makes it lovely and warm. Somewhere between room temperature and boiling. A cool hot chocolate I guess - I loved it!