Joas said he was "very nervous" about getting the pavlovas right.
"I am not used to doing cooking for other people," he said.
But Mr Hopkinson said Joas and Ingrid had done very well with the challenge.
"Pavlovas are not easy to make, and they often go wrong. But these were perfect - crisp on the outside and marshmallowy on the inside. The Japanese students loved them."
The pair got to eat their practice pavlova and said it was unlike anything they'd tasted before.
"It was very, very nice," Ingrid said.
Next the pair will learn how to make another Kiwi classic - fish and chips - and then the whole class will learn to cook some Brazilian food.
Joas and Ingrid are part of a 25-strong Brazilian contingent living in Whanganui and studying at City College for four months. They are part of a Brazilian government-funded programme which gives students from disadvantaged backgrounds a chance to experience a different culture.