If you couldn't get enough of Lewis Road Creamery's chocolate milk, then you might want to get your hands on the company's two new flavours - coffee and vanilla.

The boutique Auckland dairy company announced the two new releases, both made in collaboration with other Kiwi companies, will be sold nationwide.

Along with the two new brews, southerners will finally get a taste of the company's original chocolate milk. Bottles hit shelves south of the Cook Strait for the first time on Wednesday, with the milk on sale in supermarkets across all South Island centres.

SUPPLIED Lewis Road Creamery chief executive Peter Cullinane.

They will no doubt generate the same frenzy seen last year when the Whittakers chocolate milk sold out and demand saw shoppers lining up to buy limited quantities.

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The vanilla milk is made using Heilala vanilla grown in the South Pacific. The 'bourbon' variety vanilla bean is heated with Lewis Road milk and natural cane sugar before being bottled.

Coffee Supreme has supplied a Brazilian blend espresso for the coffee milk. Each 300ml bottle contains about the same caffeine as a flat white and a little organic coconut sugar.

Lewis Road Creamery founder Peter Cullinane reckons the coffee mix has the potential to give chocolate milk a run for its money.

Then again, he points out, he is a big coffee drinker, so he might be biased.

Lewis Road has been working on the new flavours since the start of the year, and Cullinane says it was no easy task to get the perfect brew when it came to coffee.

The partnership with Coffee Supreme saw both companies develop what Cullinane believes might be a world-first, a coffee essence.

"If it was just a straight shot of espresso or whatever it was too much coffee and not enough milk," he says.

"Reducing the espresso into almost an essence...you get the same coffee taste and the same sort of coffee hit but the ratio of milk is higher than it would be if you simply expressed coffee and added it to milk."

Partnering with Heilala Vanilla to produce vanilla-flavoured milk was a much easier process, says Cullinane.

The "dark horse in the mix", as he calls the flavour, came about as the result of a suggestion from an acquaintance.

Lewis Road's team of about 10 staff trialled it, and quickly decided it had potential. When it came down to making the final flavour choices, there was no research and development team to rely on.

"We're far too small to be too structured," says Cullinane. Instead, key staff members simply sipped away until they were certain they'd struck something magic with both blends.

The dairy company recently built a second plant to keep up with demand for its products in the North Island. The plant has also allowed expansion into the South Island.

The new brews will be produced out of Green Valley Dairy factories, one of which is still in the making.

Cullinane says if they do as well as the chocolate milk did on its release, staff there will be "highly stressed over the next little while".

Green Valley currently produces 45,000 litres of chocolate milk a week for Lewis Road, and that is likely to increase with the product being launched in the South Island.

And the Lewis Road team won't be sitting back to see how well the new flavoured milks do, although they have placed bets on which will be the best-seller.

Instead, they're already busy working on what Cullinane calls "the ultimate ice cream".

Aimed at putting the creaminess back into ice cream, Cullinane says the first flavours should be out by November.

Lewis Road made waves earlier this year when it rebranded some of its bottles Breast Milk as part of a fundraising campaign for Breast Cancer Cure research foundation.

CHOCOLATE MILK THE TASTIEST - BUT THE WORST FOR YOU

Consumer New Zealand decided to complete a blind taste test of six chocolate milks, while also comparing the nutritional content of each.

Lewis Road Creamery was up against Meadow Fresh Calci-Strong, CalciYum, Nippy's, Primo and Wave.

The company's offering had five times the fat and more than five times the saturated fat per 100 millilitres of Primo, Calci-Strong and CalciYum.

Its sugar content was also the highest out of all the milks, with a 250ml glass containing 29g of sugar - or more than seven teaspoons.

Lewis Road Creamery's marketing director Angela Weeks said the reason for the lack of nutritional content was the fact its main ingredients - Whittaker's chocolate and Lewis Road Creamery milk - were both high in sugar and fat, plus cocoa.

"Our aim has been to create a treat, and priced as such, which is about quality over quantity and natural over artificial," Weeks said.

"We suggest that like all wickedly good things, moderation is a virtue. That's why we call it a treat - even on the bottle itself. "