Yes, but we're talking about things that Tolkien would have liked in his day and these cookies are still very popular!

"McVities "Digestive" biscuits in 14oz pack. Why digestive?
Because they are easy to digest. Made from wheatflour, and the
most popular brand of cookie in England. Click on the picture to enlarge."
Speaking of biscuits, how about those anise cookies? They are crispy on the outside and cakey on the inside.
I was also thinking of those egg biscuit cookies, but they are too light colored to be like lembas.
They look too crunchy - like a cracker.
Cornbread.... think thin cornbread!