She counts Lorde as a client and has done her part to make the quintessential Kiwi summer drink fashionable again.
And now milkshake entrepreneur Deanna Yang, right - the woman behind the popular central Auckland Moustache and Cookie Bar - is joining forces with Anchor Milk to find the country's best milkshake.
The 24-year-old guest judge is preparing to tour the country next year on a quest for milkshake excellence.
Yang said there were three important components to perfecting a great milkshake. The texture had to be smooth, it had to have a creamy, milky taste and it was important to never skimp on good quality ingredients.
Her favourite is a chocolate Ferrero Rocher creation. "It's decadent and rich and I love it," said Yang, who admitted it was a struggle to limit herself to one a fortnight.
She said Lorde's favourite shake was created by the teen singing star but once word got out it became a popular blend among customers.
"She always gets a peanut butter and nuttella mixture. Once everyone found out she had that everyone wanted it."
Yang said she was looking forward to seeing the amazing creations from around the country.
"There's nothing quite like a frothy, sweet milkshake to quench your thirst on a summer's day," she said. There are four categories including best protein, best lactose free, best smoothie and best creative combination milkshake.
The top milkshake in the four regions - Upper North Island, Central North Island, Lower North Island and the South Island - will be decided by popular vote before Yang and Tirau dairy farmer Joanne Leigh judge the finalists in March. Voting is open until February 28.
Ferrero Rocher shake
• 3 standard Ferrero Rocher chocolates
• Two scoops of vanilla icecream
• A small spoonful of nutella
• Anchor calci-plus milk
Blend until smooth. Pour into a glass and top with crushed Ferrero Rocher chocolate