Since we are talking cocktails and we are on HN, shout out to Drinkable [1], a mobile app with cocktail recipes, 100% opensource, available on F-Droid as well

[1] https://github.com/MOIMOB/drinkable

Not free or open source, but Mixel[1] is fantastic. You can find recipes by name, by ingredient, by taste. You can say what ingredients you have, and see what you can make, and you can even have it calculate which ingredient, if purchased, will open up the most new recipes to you.

[1] https://www.mixelcocktails.com/