German writing evolved several times in the 1900’s. That most likely impacted the legibility as different types of training came through each letter.

As an aside, reading recipes from that era is nearly impossible for me as a foreigner.

Folks can learn more about the evolution by picking up the trail here: https://en.m.wikipedia.org/wiki/Kurrent

It's also mostly impossible for Germans (that's why there's a whole subreddit of people that are capable of parsing Sütterlin)!

You might be able to recognize some letters in the excerpt (u/n/w especially) from Sütterlin, but lots of others (especially the upper case ones) are more modern.