For the person that wants to cook historically, it’s certainly a real challenge. There are a number of types of enthusiasts out there with varying levels of involvement, i.e. “how much time and money do I want to put into cooking historically?” Some people love going to the library (yes, Virginia, those things are still around) and research old texts, while others would prefer finding recipes online.
With the internet, there has been a great insurgence of information, which is both good and bad. Sometimes you have to wade through the bad stuff to get to the good. Things that you would think would be online, just aren’t on, and well… I think most people that have been online for research, get this.
Daz buoch von guoter spise, is a German manuscript dated between 1345 and 1354, which the original being in the university library at Munich. The translation is over here if you are looking for some Historical German recipes to have some fun with. These aren’t redacted, but at least they give you some ideas of what to use.