The most famous one is smoked tofu.
The stinky tofu at the east gate of Qushi Normal University is also good.
There are pancakes, which are not used to by foreigners, but they are really delicious. Machine pancakes like that don't have the original flavor of pancakes, but the handmade ones are better.
There are also sesame chips and peanut chips. If you want to travel to Qufu, those vendors will follow you and ask you to buy them. What they sell is actually not delicious, but the ones in the supermarket are better, preferably in bulk and very fragrant.
I can remember so much, o (∩ _ ∩) o. ...