Trying to get the DC to cook some more, to build up to them being able to cook unsupervised when no adult is present.
How did you go about it, which meals did you start them off on, and how much practice had they had before you let them do it completely unsupervised?
DC2 is 12 and DC1 is 15. DC2 very occasionally helps, but usually only preparation or baking. DC1 has dyspraxia and ASD, no sense of danger, generally manages to cut himself with a sharp knife in his hand, panics easily.