Will's Blog

How to Make Will & Co’s Signature Oat Milk Cold Brew at Home

on Feb 09, 2024

Recently, we shared our cold brew coffee recipe. Now we’re back with another summer sipper – our crowd favourite cold brew with oat milk recipe.

Some of you may have tried this bad boy at our HQ Tasting Bar in Bondi, where it’s poured on tap, but we’ve got great news for the rest of you: it’s super easy to recreate at home.

As the name implies, oat milk cold brew uses cold brew coffee as the base, which gives it a smoother and more nuanced flavour profile than a regular iced latte. The oat milk provides unmatched creaminess, while a touch of maple syrup and dash of cinnamon brings perfectly balanced sweetness and subtle spice.

Poured over ice, it’s a dangerously tasty and seriously easy-to-make bevvy that’s perfect for the warmer months. In fact, we reckon this is the ultimate summer sweet treat. 

An iced-cold glass of Will & Co's oat milk cold brew

Oat Milk Cold Brew Recipe Steps

Our top-notch recipe is for a single serve of oat milk cold brew. If you wish to batch-brew this recipe, simply double or triple it.  


  • 160mL cold brew (check out our homemade cold brew recipe)
  • 60mL oat milk 
  • 5mL maple syrup (1 tsp)
  • Sprinkle of cinnamon or cinnamon stick

Brew gear: 

  • Drinking glass 
  • Measuring cup
  • Airtight container if you’re making a larger batch 


  1. Grab a drinking glass large enough to fit all the liquid ingredients.
  2. Pour the cold brew into your glass.
  3. Separately, combine the oat milk and maple syrup, stir furiously together to mix, then add to your glass.
  4. Add a cinnamon stick or a dash of cinnamon.
  5. Give your brew a good stir, making sure all ingredients are well mixed.
  6. Add ice cubes and sip away. Enjoy!
Photos of Will and Co's oat milk cold brew being poured on tap

Top Tips for Making a Ten-Out-of-Ten Oat Milk Cold Brew

For the tastiest results, homemade cold brew is your best bet. But don’t stress if you’re short on time – pre-made cold brew will do the job.

You can batch make this recipe but be sure to enjoy within five days while the oat milk is still fresh. To keep your oat milk cold brew in primo condition, store it in an airtight jar in the fridge. 

The beauty of this brew is that it can be tailored to suit every coffee lover’s preference. If you prefer a stronger coffee taste, sub some of the oat milk for cold brew. And for those who have a bit of a sweet tooth, try or a double dose of maple syrup. 

    Summer Season Go-To

    Our oat milk cold brew is a go-to for the summer season – being incredibly easy to recreate in the comfort of your home.  

    Get creative and have some fun trialling a bunch of ratios until you find the perfect mix for you. Whether you like it sweet, strong, milky or extra cinnamon-y (or all of the above) this recipe is for you. And don’t forget to check out our recipe for making the perfect base cold brew.

    Will & Co's cold brew poured into a glass with ice