My two cats who certainly get their fair share of treats occasionally puke them up from eating too fast.

This could be the case, given they rarely get them.

If she seems happy and fine - it could be what I said, she may not like the specific flavor or perhaps it was a small reaction.

If all is well tomorrow, try giving a single treat, and see if it comes back up again.

If so, or she acts unusual from today’s treats, definitely do consult an actual vet. There are some virtual services, saw you are a ways away from an in person vet.

Happy to try and answer any questions if I can, but I wouldn’t stress too much unless she’s acting weird.