Slightly misleading title; I know how to make candi sugar. But imagine my surprise when I woke up and found what had happened to 8KG of freshly mashed Maris Otter.
I've caramelised wort right right down till it's almost burnt then deglazed it with a touch of water and added it back into the brew. Depends on if it's actually burnt or just shy.
Bugger to clean that one.
If it's not absolutely burnt to a crisp my advice would be to add it in to a porter or even ESB. If it's burnt then get some sodium percarb and super hot water onto it pronto.