You don’t mention if it is a “special” birthday or an “ordinary” one, so am guessing the latter. Recently got my DH a Velvetiser from Hotel Chocolat (you mentioned he likes their chocolate), which I notice are on special offer at the moment. This makes amazing hot chocolate very easily, no washing burnt saucepan! If you are feeling extra generous, you could also get him a subscription to have more of the sachets delivered every so often. Not dirt cheap but cheaper than buying hot chocolate in Starbucks. And DD bought him lovely sheepskin slippers from Celtic and Co which was mentioned earlier