People use "iced coffee" and "cold brew" interchangeably, but they're two genuinely different drinks made by two different processes, and they taste nothing alike. Choosing between them comes down to whether you want smooth and chocolatey or bright and aromatic — and how much planning you're willing to do.
The short version
Cold brew steeps coarse coffee in cold water for 12–18 hours, producing a low-acid, heavy, chocolatey concentrate you dilute to taste. Japanese iced coffee brews hot directly onto ice, flash-chilling the coffee so it keeps the floral and fruit aromatics that cold water never extracts. Cold brew needs a day; iced coffee needs three minutes.
| Cold brew | Japanese iced coffee | |
|---|---|---|
| Time | 12–18 hours | 3 minutes |
| Grind | Coarse | Medium-fine |
| Acidity | Low | Bright |
| Body | Heavy, syrupy | Clean, light |
| Best beans | Medium/dark | Light, fruity |
| Keeps | 7–10 days | Drink immediately |
Cold brew vs Japanese iced coffee at a glance.
How to make cold brew properly
Use a 1:8 ratio for concentrate — 125 g coarse coffee to 1000 g cold filtered water. Stir once, cover, and leave at room temperature for 14 hours or in the fridge for 18. Filter through a paper filter or a mesh basket, then dilute the concentrate 1:1 with water or milk over ice.
The most common mistake is grinding too fine, which turns the steep bitter and makes filtering miserable. Coarse — like breadcrumbs.
OXO Cold Brew Coffee Maker
Rainmaker lid distributes water evenly; brews a clean 1:8 concentrate.
Amazon · We may earn a commission
Toddy Cold Brew System
The original — makes big batches of very smooth, low-acid concentrate.
Amazon · We may earn a commission
How to make Japanese iced coffee
Brew a normal pour over, but replace roughly 40% of the brew water with ice in the carafe below. For a V60: 22 g coffee, 220 g water at 96°C poured over the bed, landing on 150 g of ice. Swirl until the ice melts. The result is a full-strength cup, chilled instantly.
Hario V60 02 Ceramic Dripper
The dripper we use for flash-chilled iced coffee.
Amazon · We may earn a commission
Fellow Stagg EKG Electric Kettle
Variable temperature control for precise iced pour overs.
Amazon · We may earn a commission
Which one should you make?
Make cold brew if you drink iced coffee daily, take it with milk, or are sensitive to acidity — a single batch covers a work week. Make Japanese iced coffee if you buy interesting light roasts and want to actually taste them, or if you decided you wanted iced coffee eleven minutes ago.
Storage and dilution
Keep cold brew concentrate in a sealed glass bottle in the fridge; it holds well for 7–10 days and starts tasting flat after two weeks. Dilute per glass rather than all at once so you can adjust strength as the batch ages.
See our full cold brew guide for batch sizes and troubleshooting.Shop Ready to upgrade your setup? Check our full reviews.ShopFrequently asked questions
Is cold brew less acidic than iced coffee?
Yes. Cold water extracts fewer acids, so cold brew tastes smoother and chocolatey, while flash-chilled iced coffee keeps more of the bright fruit acidity.
What is the best cold brew ratio?
Use 1:8 for concentrate — 125 g of coarse coffee to 1000 g of cold water — steeped 14–18 hours, then dilute 1:1 with water or milk.
How long does cold brew last in the fridge?
Concentrate keeps well for 7–10 days in a sealed glass bottle and starts tasting flat after about two weeks.
Recommended gear
Gear used in this techniques guide
Editor-tested picks. Buying through these Amazon links keeps HomeCoffeeBrew free.
Free download
Like this guide? Get one every Sunday.
Plus our free Brew Ratio Cheat Sheet — dial-in ratios for every method, delivered instantly as a PDF.
