https://www.edenproject.com/learn/eden-at-home/a-guide-to-pr... has a nice list of plants of the era and "Black peppers" seems to be one that ticks the box's and not upon the list.
Its essence of chicken, without all the work of separating and eating the meat yourself.
Searching around a bit:
[1] claims Myocene (5-20M years ago)
[2] claims the genus is as old as the Upper Cretaceous (100M years ago), but I don't see the Piper Nigrum (black pepper) species in Table 1.
So, it seems to be a bit more modern than some of the other plants in my post. Please correct me if I missed anything, or if you find a good source!
1. https://www.sciencedirect.com/science/article/abs/pii/S10557...
2. https://bsapubs.onlinelibrary.wiley.com/doi/pdf/10.3732/ajb....