Hey there, thanks for the message. Oh bless your Nana, I hope she’s coping with the dementia.
Plenty have tried Huel warm. The Huel powder formula has not been optimised for heating unlike H&S, our concern is with the quantity of nutrients degrading/reducing in Huel Powder - so it’s not that you can’t make Huel warm, it’s just the result will likely be a less nutritious Huel, as opposed to a rancid Huel.
So warming your Nana’s Huel shouldn’t be a problem.
Interestingly, before we released Hot & Savoury we got this tested in H&S, and actually the result was not as bad as we first thought it would be - fewer nutrients were degraded.