Don't know of a way to prevent these "cookies" from splitting. It's just the nature of wood.
Possibly impregnating with PEG, but then I wouldn't put a cake on it.
You could make a preemptive saw cut from the outside to the center so at least it would look intentional.
Possibly impregnating with PEG, but then I wouldn't put a cake on it.
You could make a preemptive saw cut from the outside to the center so at least it would look intentional.