OP back here!
Thank to all for the thoughtful and quick responses! Lots of cycles of soaking, hot water, and dishwasher tabs are making slow but steady progress. I can now see the bottom in one spot (down from 3 solid burned inches of chocolate) which gives me hope
Our families Christmas Eve tradition has always been cheese fondue before church and chocolate after and everyone loves it. It’s one of my most treasured memories. I lost my dad earlier this year and was putting a ton of pressure on myself to make everything perfect which (in hindsight) contributed to my late night stress over this. All is good and calm.
Merry Christmas and Happy New Year to DCUM. I found this place 10 years ago and have moved through the boards as times and interests have changed. What has remained consistent has always been the excellent perspectives, thoughtful advice, and creative ideas….and also the occasional snark, but that’s ok too.