Answer:
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
Slayer of regrets, old and new, sought by many, found by few.
I can be cracked, I can be made. I can be told, I can be played.
When set loose I fly away. Never so cursed as when I go astray.
Do you know what you can hold without ever touching it?
When is it bad luck to see a black cat?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?