Can I make custom recipes without an addon?
Solution 1:
It's possible to create custom recipes via behavior packs. Examples of this are the "Bedrock Tweaks" crafting tweak packs. You can download some via the below link and open them with a zip program to view examples. I know that you can load these on mobile on Android for certain, and am under the impression it works for iOS as well.
http://bedrocktweaks.net/crafting-tweaks/
Note that loading custom behavior packs disables achievements for a world.