Zauber-Cookie

The magician opens a packet of Oreo biscuits and eats one. He then picks up another and gives it a bite. The spectators are clearly shown the biscuit with a big bite in it. The magician then blows on the biscuit and instantly and visibly makes it become whole again!

Carry it always around and astonish young and old!
The effect does not require a table, so it is perfect for walk around magic.