you need to go in the creepy steple and you will find a hole in the wall roll in it and
you will find it

Solve ZessT's trouble then go to Creepy Steeple roll under the wall open the chest and go
to her house give her the book and you can use two items to cook with.

When you are far in the game go to the help center and there will be a topic with Zess
T's name on it. You have to go to the Steple with the boos. Then you have to turn into the
rolling curse. Then you will you a small holeon the wall nearest to the top. Go in and you
will see a book. Get it then you will complete the Help Request. Then go to the place
where you cook and then give the book to Zess T. Then she will be surprised then you can
cook with 2 items!