As far as I know this is mostly the work of [Jennifer Daniel](https://jenniferdaniel.substack.com/p/introducing-emoji-kitchen- https://jenniferdaniel.substack.c

As far as I know this is mostly the work of [Jennifer Daniel](https://jenniferdaniel.substack.com/p/introducing-emoji-kitchen- https://jenniferdaniel.substack.com/p/introducing-emoji-kitc...), who is the chair of the Unicode Emoji Subcommittee and works at Google. She's great! She did create all of the emoji mashups for the first version of emoji kitchen by herself. I don't know if she had help for the current version, which features many more emoji combinations.