Definitely declare it. ALL food has to be declared.

When you say declare it do you mean to just write down on the arrival card i have it in my checked baggage or did you mean to physically declare (show it) to someone at the airport.

Removed because it now makes the post disjointed.
OP, you tick the box that asks about food items then if Biosecurity want to see it, they will ask. NZ is very strict about not declaring food items.
Why are you even bothering? They do sell the stuff over yonder. Nice mess in your luggage if the top comes off. Baggage handlers don't really give good touchy-feely 101 kid glove treatment to your personal belongings. It's against their nature.

I know but i bought it only a few days ago in Aus $18, and ive heard it's overpriced in NZ i dont know?