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How to make nitro [cold brew] coffee at home for free

Nitro cold brew coffee. It's kind of all the rage. And why not? It has the same fundamental characteristic of cold coffee, in that it's cold. (Some make it with cold brew, giving that mellow, low-acidity flavour profile that is also trending, but some make it with chilled hot-brewed coffee.) And on top of that, it has a great texture ('guinness like', or for non-drinkers, creamy and warm), and looks stunning.

Look at that texture. You'll see how to make this below.

Nitro's great. I'm a fan. The main problem: it's expensive - I've seen it go for anywhere up to US$10 a glass. That is OK for the occasional indulgence, but there's no reason you can't make it for yourself at home and indulge as often as you like. Because there are...

Three dirty secrets about nitro cold brew

Dirty secret #1: You can make the base of nitro (cold brew) in a bucket.

Or a jar, if you're at home making non-commercial quantities. Cold brew can be made in many ways - you can make hot coffee and chill it, you can slowly drip water over coffee grounds over 8+ hours, or you can just immerse coffee in water and store it somewhere safe. I make hot brew (using a very standard method like using a pour-over device or an Aeropress) and chill it, so I don't have to adjust my grinder.

Dirty secret #2: Nitro coffee is basically cold coffee with air mixed in.

Nitro is essentially cold coffee with nitrogen dissolved in it, and air (the stuff you're breathing... unless you're a web-crawling robot) is about 80% nitrogen. The reason they don't use air in making kegged nitro is because of the oxygen component of air, which, if I may oversimplify, makes coffee go bad much more quickly.

Dirty secret #3: You can make nitro coffee with a blender.

Yeah ok so it's 'nitro-esque'. But it's basically the same texture. You just dissolve air into coffee with a blender. And get pretty much the same effect.

How to make nitro-esque coffee in six ridiculously easy steps:

Step 1: Get your coffee equipment together. I like to make regular hot coffee using an Aeropress these days. Normal hygiene: fresh beans, a decent grinder (burr, not blade), control your weights, temperatures and brew times and optimise for your preferred flavour.

Step 2: Brew the coffee. If you don't get a result that looks something like this, then you either haven't actually done step 2 or you have done it very, very wrong.

Step 3: Freeze it for a little while. (Out of frame: my delicious leftover curry.) Don't leave it in there too long, or it'll actually freeze! I find the optimal time to be somewhere between not enough and too much. (read: experiment). You can just leave it in the fridge too, or if you've made cold brew, skip this step altogether.

Step 4: Get one of these bad boys. Any hand blender will do. Mine is a super generic brand (this is a white-label generic made-in-China product). If you don't have one, I bet a regular jug-style blender would work, or even an electric whisk (but I haven't tried any of those).

Step 5: Whizz whizz whizz...

... and pour. Preferably into a stylish glass or tumbler.

And enjoy. Interested to hear what you think.