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Jug of murky brown liquid sitting in my fridge door since Tuesday night, that’s the whole secret, really. No machine, no fuss, just time doing the work while I’m asleep. I started making cold-brew coffee at home about two years back, mostly because the long black from the place near the boat ramp in Terrigal was getting expensive at four dollars a pop, and I’ve not gone back to a hot cup in summer since.
The thing that surprised me most is how different cold-brew coffee tastes to iced espresso. It’s rounder, less sharp, almost sweet without any sugar in it at all. I’ve noticed it doesn’t sit on my stomach the same way either, though I’ll say upfront that’s a personal observation, not a claim I’d make for anyone else’s gut.
Why cold-brew coffee behaves differently
Heat pulls more out of a coffee ground than cold water does, including a fair bit of the acid and bitterness that makes a rushed morning espresso taste harsh if the barista’s had a big one. Steeping coarse grounds in cold or room-temperature water for twelve to eighteen hours draws out flavour slowly and leaves a lot of that acidity behind in the grounds. The result is a concentrate that’s smoother, lower in acid, and honestly quite forgiving if you’re a few hours late draining it.
I’ll also say, because someone always asks, that cold-brew still carries caffeine, sometimes more per serve than a hot cup if you’re not diluting it properly. This isn’t a decaf trick. If you’re watching your intake, Sleep And Weight Loss has some useful context on how stimulants and rest interact, worth a read before you start necking it at 4pm like I did for a stretch last winter.
What you actually need
No special gear required, despite what the cold-brew towers at the kitchenware shops suggest. A large glass jar, a sieve, and a clean chux or some muslin cloth will do the job. I use a two-litre jar that used to hold pasta sauce, washed out properly, lid loose, sitting on the bottom shelf.
Ingredients
- 100g coarsely ground coffee beans (ask for a cold-brew or French-press grind)
- 1 litre filtered or cooled boiled water
- Ice, to serve
- Milk of your choice, or water, to dilute
- Optional: a cinnamon stick or a strip of orange peel added to the jar for steeping
Method
- Add the ground coffee to your jar or jug.
- Pour over the filtered water, stirring gently so all the grounds are wet.
- Cover loosely and leave on the bench overnight, or in the fridge if your kitchen runs warm, for 12 to 18 hours.
- Strain through a sieve lined with muslin or a chux into a clean jug or bottle, pressing lightly on the grounds to extract the last of the liquid.
- Store the concentrate in the fridge for up to a week.
- To serve, pour over ice and dilute roughly one part concentrate to one part water or milk, adjusting to taste.
Serving it the way I actually drink it
Most mornings it’s concentrate, oat milk, a handful of ice, nothing else. Some weekends, when the kids are still asleep and I’ve had my swim at Terrigal Haven, I’ll add a dash of maple syrup and a shake of cinnamon, closer to a treat than a habit. If you’re after something a bit more involved for guests, the golden milk approach over in A golden milk recipe worth making on repeat uses a similar steeping logic, just with spices instead of beans, and the two actually pair nicely as a hot-cold contrast on a brunch table.
A variation worth trying
Steep with a cinnamon stick or a wide strip of orange peel in the jar alongside the grounds. It sounds fussy but it isn’t, you just drop it in and pull it out when you strain. The orange peel version in particular reminds me of something closer to a coffee cordial than a straight brew, and it’s become the one I make when my sister-in-law visits because she doesn’t take sugar and this gives her something to actually enjoy.
Where this fits in a slower morning
I’ll admit the real reason I like cold-brew coffee isn’t the taste, though the taste is good. It’s that making it the night before takes coffee off the list of things I have to think about before 6am. The jug’s just there. I pour, I dilute, I’m out the door towards the water. On the subject of mornings that don’t ask too much of you, the piece on Simple breakfasts for mornings when you have no appetite runs along a similar line, less decision-making, more routine that just works without you fighting it.
My quiet opinion, and I’ll own that it’s a bias, is that the home-brewed version beats most cafe cold-brews I’ve paid for on the Central Coast. Cafes tend to over-dilute to stretch the concentrate further, and you end up with something thin and a bit flat. Making your own means you control the ratio, and you can push it stronger on the mornings that call for it.
A note on beans and water
Nutrition Australia and CSIRO don’t have much published specifically on cold-brew extraction, fair enough, it’s not exactly public health territory. But the general guidance from Healthdirect on caffeine is worth keeping in mind if you’re brewing stronger concentrate than you’re used to, since it’s easy to drink more caffeine than you intend when the coffee tastes this smooth. For the beans themselves, I buy whatever’s freshest from the grocer on The Entrance Road rather than chasing a specific origin, and I’ve found the grind matters more than the bean. Too fine and you’ll get a cloudy, slightly bitter brew that’s a pain to strain. Coarse and even is what you want, closer to breadcrumbs than sand.
If you’re trying to tighten up the grocery spend while still keeping small pleasures like this one, Eating well when the grocery budget is tight has some practical thinking on where to spend and where to pull back, and coffee beans bought in bulk from a local roaster tend to work out cheaper than the daily cafe habit once you do the maths properly.
What I’ve settled into, more or less, is making a batch every Sunday night alongside whatever else needs prepping for the week. It sits in the fridge, it waits for me, and it’s one less thing to get right before the sun’s properly up.
– Tanya Pryce, Golden Door Living
