I got this one. ;-},,, the terribly most recent dry spot on a puppy pee pad. I will see the limited toe nail marks the limited paw prints, and that i will tell via smellyvision it's undoubtedly a puppy pee pad with only 1 little dry spot left.
Or since you bake it may simply be spray foam from a will, however that's boring.
@kittyjenny haha welcome to #whatisit, I love your guesses and despite being wrong I do have a @steem-bounty on this post so you should receive some Steem post-payout from them. I hope you try again this week!