Monte Cristo was named the champion of champions and cheesemaker Jonathan Emerson named champion cheesemaker at the NZ Champions of Cheese Awards in Hamilton.
The business was started in 1987 by Bob and Sue Berry. Mrs Berry died last month.
Her drive and passion for the business was remembered when the wins came.
"We’ve only ever won the supreme champion once before with Windsor Blue.
"And for Monte Cristo to go through, it’s nice timing, especially with Mum [Sue] passing on last month," Whitestone Cheese managing director Simon Berry said.
"Here we are recognised as New Zealand’s leading producer and getting to this point with all the hard work she’s put in, and her vision and her taste".
Last month, the business secured an impressive 18 medals, including six highly coveted gold medals at the cheese awards.
All the medal winners were then in contention for trophies, which were awarded at a ceremony on Thursday night.
Whitestone was awarded five trophies, including the top award, Woolworths Champion of Champions.
Monte Cristo also received trophies for Champion Original Cheese and Maui Sheep Milk Best-in-Class Sheep Milk Cheese.
Mr Berry said they were "thrilled" with the wins and his father Bob was "ecstatic".
Head cheesemaker For Jonathan Emerson, who has been at Whitestone for 14 years, the Champion Cheesemaker title win was "a testament to his focus on quality and technique and also managing all those complex recipes under one roof," Mr Berry said.
Whitestone’s Monte Cristo had been a "pioneering" sheepmilk recipe cheese.
It had taken a long time to perfect.
"It has won gold medals before, but to go through to win the grand champion just shows the quality of it," Mr Berry said.
Its development came from his parents experimenting with sheep milk suppliers and working with farmers in Southland and Dr Jock Allison at Invermay.
"He pioneered it by bringing in the first East Friesian Cross to create a cheese with, so Monte Cristo was born out of that," Mr Berry said.
Judges praised Monte Cristo saying it was "the cream of the crop".
