I was getting to that, reader Nicole! There’s no way to know for sure, so I’ll play it safe and say sometime in the middle 1800’s. That’s about the time that the very large waves of immigrants from central Europe started arriving in the US. One of the earliest known instances of a strudel recipe printed in the States was an 1889 Jewish-American classic called Aunt Babette’s Cook Book. It contained an entire section on strudels, including many of those cited below plus one for calves’ liver and lung. Don’t knock it ’til you try it, folks!