UE4 doc about content cooking is very little, are concepts in UDK docs still the same? UDK | ContentCooking
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UDK is different than UE4. I would not use the documentation from UDK for UE4. If you’re looking for something similar to UDK for cooking your project, check out [Unreal Frontend][1].
Good luck!
Using the Unreal Frontend Tool | Unreal Engine 5.1 Documentation