How To Make Cold Brew Coffee

Want to make your own cold brew coffee at home? Follow this super simple guide and you’ll be a cold brewing coffee expert in no time!


What Is Cold Brew Coffee?

Cold brew coffee is simply coffee that is brewed in cold water (not to be confused with iced coffee which is regular coffee cooled and served with ice). 


With cold brewing, it’s time that extracts the flavour from the coffee bean rather than heat. By removing the use of heat, the brewing is more sympathetic to the bean and highlights the flavour characteristics which can be lost in hot water brewing. Cold brew coffee is also less bitter and acidic than regular coffee, resulting in a sweeter, smoother and mellow taste. 


Cold Brewing Methods

Immersion Brewing is a slow but simple brewing approach which produces a full-bodied and full-flavoured cold brew coffee that’s great over ice. It’s very concentrated, so usually requires dilution and takes between 8 and 24 hours to brew. The time required for steeping will depend on the grain size - the larger the grind, the longer it’ll need.


Slow Drip Brewing can require a little more room in your fridge as the equipment tends to be larger but in some ways, it’s more convenient as your cold brew could be ready in as little as 1 hour! There’s also no need to work out the steeping time, once it’s dripped through, it’s ready to drink! The slow drip method tends to create a lighter and brighter tasting cold brew coffee.

Cold Brew Coffee Equipment

Having a cold brew coffee maker such as the Hario Mizudashi Cold Brew Coffee Pot, the Hario Cold Brew Coffee Filter in Bottle or the Grunwerg Cold Brew Coffee Maker is an inexpensive way to make perfect cold brew coffee at home using the immersion brewing technique.


For a slightly higher price point, take a look at the Hario Shizuku Slow Drip Brewer or the Hario Water Dripper Drop which both use the slow drip brewing process.


The Best Coffee To Use For Cold Brew

Cold brewing is very forgiving and a totally different ball game to hot water brewing, so try experimenting with different varieties you wouldn’t usually drink and find your sweet spot. Cold brewing produces a much more mellow flavour, so try and go for a coffee which packs a punch! 


You need to use beans which are coarsely ground, using really finely ground coffee can result in over-infusion and create a harsh and bitter taste, this is because it’s harder for the water to flow easily through the particles. 


It’s often said that single-origin coffee beans are better for cold brewing as it allows you to truly appreciate the deep flavours of a bean. Using light or dark roast is completely down to personal preference but it’s always good to experiment - lighter roasts will require a slightly longer brewing time.


Some of our favourite coffee to use for cold brewing here at Coffee Box are:

True Start’s Energising Columbian coffee beans 

Volcano's Fullsteam Colombian coffee beans

True Start's Vibrant Honduran coffee beans


How To Drink Cold Brew Coffee

Depending on how it’s brewed, cold brew can be much stronger than standard brewing and is often watered down to taste. You can dilute with water, milk or cream. 


Undiluted cold brew coffee will keep in your fridge for up to 2 weeks, although the flavour quality will degrade after the first week. Once diluted, drink within 2 to 3 days.