So how do you practise for a competition when you don't know what you're cooking?
"You just have to practise your basic cooking techniques," Matt said.
The students are putting in long hours in the kitchen under the guidance of mentor Dean Wong and teacher Linda Hardcastle, who will both be travelling to Auckland with the pair.
"It's a big undertaking, because we have to take everything we need for the competition with us - literally everything, including the kitchen sink," Ms Hardcastle said.
Matt and Charlotte are looking for sponsorship to help them get to Auckland. If you would like to help with sponsorship, please contact Linda Hardcastle through Whanganui High School.