Concept: beer that is free as in freedom, not as in gratis
You still have to pay for it because it costs money to make. But it's completely open-source beer so you can recreate it yourself if you don't want to buy it pre-made, or you want to modify the recipe.
I have no idea how to make beer otherwise I'd have a crack at this shitpost myself...
Now I'm thinking about a proper "programming language" for cooking recipes.
Just imagine the possibilities: Automated checking for for allergies and such, easy substitution of ingredients as well as portion calculations, being able to fork recipes and change them to your liking, and later diff the recipes.