I simply use Joplin subnotebooks. I have one for home cooking and one for brewing beer. Markdown works well enough for me in terms of portability and readability. It also syncs between my devices, so I have several copies of my recipes.

For home brewing, I have written a few scripts that convert BeerXML to Markdown for easy importing. I create the recipes in my home brewing software (currently Kleiner Brauhelfer), export the BeerXML file and convert it to Markdown for secondary storing.