Oak milk is an Australian flavoured milk brand, not a plant-based milk made from oak trees. If you landed here looking for oat milk (the dairy alternative), you may have a simple typo. But if you’re curious about the iconic Australian drink sold in cartons and bottles at service stations across the country, you’re in the right place. OAK has been a staple of Australian fridges since 1967.
An Australian Brand Since 1967
OAK started as the dairy brand of the Raymond Terrace Co-operative in New South Wales. It later became part of the Hunter Valley Co-operative Dairy Company before eventually being acquired by Lactalis, a French multinational that’s one of the largest dairy companies in the world. Despite the corporate ownership change, OAK remains distinctly Australian in its branding and market presence, sold primarily in convenience stores, supermarkets, and petrol stations across the country.
The brand built its identity around being a filling, satisfying drink rather than just a beverage. Its long-running “Kill Hungrythirsty Dead” campaign targeted people looking for something between a snack and a drink, positioning OAK as both at once.
Available Flavors
OAK’s core lineup revolves around three flavors: chocolate, strawberry, and iced coffee. These come in multiple sizes ranging from 200ml cartons up to 2-litre bottles, covering everything from lunchbox portions to family-sized containers. The 600ml bottle is the most recognizable format, the one you’ll see in servo fridges nationwide.
Beyond the staples, OAK offers a rotating cast of additional flavors in the 600ml size:
- Banana
- Vanilla Malt
- Egg Nog
- Peppermint Crisp
Limited edition and seasonal flavors appear periodically, and some of these (like Peppermint Crisp) develop cult followings that keep them in the permanent range. The UHT (long-life) versions are available in chocolate, strawberry, and iced coffee, making them popular for lunchboxes and pantry stocking since they don’t need refrigeration until opened.
What’s Actually in It
OAK is pasteurised cow’s milk with added sugar, flavoring, and a few stabilisers and colors. Taking the chocolate variety as an example, the ingredients are milk, sugar, cocoa (1%), maltodextrin, flavours, a stabiliser, salt, and food coloring. It’s a simple ingredient list, but the sugar content is worth noting.
Per 100ml of the chocolate version, you’re getting 3.6 grams of protein, 3.8 grams of total fat, and 10.6 grams of sugar. That means a standard 600ml bottle contains roughly 64 grams of sugar, which is about 16 teaspoons. For context, that’s more than a can of cola. The protein content is decent at around 21 grams per 600ml bottle, which partly explains the brand’s “meal replacement” style marketing, but the sugar load is significant if you’re drinking it regularly.
The strawberry and iced coffee varieties have similar nutritional profiles, with minor differences depending on the flavoring ingredients.
OAK vs. Oat Milk
Because the names sound nearly identical, it’s worth clarifying the difference. OAK milk is a dairy product, full-fat cow’s milk with flavoring and sugar. Oat milk is a plant-based milk alternative made by blending oats with water and straining the mixture. They have nothing in common besides sounding alike.
Oat milk is popular with people avoiding dairy due to lactose intolerance, allergies, or dietary preference. OAK milk contains lactose and is not suitable for anyone with a dairy sensitivity. The OAK brand does not currently offer a lactose-free version of its flavoured milk range. (Oak Farms Dairy, an unrelated American brand, does sell lactose-free milk, but that’s a completely different company.)
Where You Can Find It
OAK is sold throughout Australia in Woolworths, Coles, IGA, and most independent supermarkets. The 600ml bottles are a fixture in petrol station fridges and convenience stores, where they’re often purchased as a grab-and-go option. The smaller 200ml and 300ml cartons are common in school canteens and lunch packs. Outside Australia, OAK is much harder to find, as the brand’s distribution is almost entirely domestic.