COFFEE BROTHERSWORMS · OBERMARKT 8Order ↗The guide · Cold extraction
A small cold batch with clean equipment and steeping in the fridge.
Recipe, techniques and troubleshooting. All on one page.
Your starting recipe
A starting point for your beans and your taste.
Quantities adjust in the steps too. Do not simply scale brewing time and grind; observe equipment size.
What you need
Tick off what is ready. You can start at any time.
Now it is time to make coffee
Get an overview first. Then work through each action at your own pace.
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Are lid and filter clean too?
A · What to observeVessel, lid and filter are cleaned and fully rinsed.
How to correct itClean all parts and rinse away any cleaning product residue.
You start the motion. A shortened illustration, not a brewing timer.
Step 1 of 5
Clean the vessel, lid and filter and rinse away any cleaning-product residues completely.
Is the intended filter seated correctly?
A · What to observeWeighed coffee stays in the correctly seated filter.
How to correct itFit the filter following the manual and weigh the coffee.
You start the motion. A shortened illustration, not a brewing timer.
Step 2 of 5
Weigh the coffee and insert the filter following the equipment instructions.
Does cold water reach the centre?
A · What to observeGrounds in the centre are wet rather than clumped dry.
How to correct itCarefully wet dry clumps fully with cold drinking water.
You start the motion. A shortened illustration, not a brewing timer.
Step 3 of 5
Add cold drinking water and wet all the grounds. Avoid dry clumps inside.
Carefully wet dry clumps in the filter completely.
Is the brew covered and refrigerated?
A · What to observeLid closed, brew in the refrigerator, start time recorded.
How to correct itCover the brew, place it in the refrigerator and record its start time.
You start the motion. A shortened illustration, not a brewing timer.
Step 4 of 5
Seal the batch and put it in the fridge. Note the start time.
Note the start time; this batch stays refrigerated.
Is the filter removed before tasting?
A · What to observeThe filter and grounds leave the drink; the coffee is mixed gently.
How to correct itAfter the planned steep, remove the filter, mix gently and taste.
You start the motion. A shortened illustration, not a brewing timer.
Step 5 of 5
After your planned steeping time, remove the grounds or filter. Gently mix the drink and taste a small portion.
Discard unusual-looking batches and use finished coffee promptly.
All steps completed
Take your time tasting. If you want to change something, focus on one setting next time.
Schematic movement and illustrative AI images. Animations shorten the action; follow the quantities, wait times and safety guidance in the text.
If the flavour is not quite rounded yet
For the next batch, change either dose or steeping time, not both.
Check the filter fit or filter again appropriately if needed.
Why it works
Cold brew starts with cold water: coffee and water stay in contact for an extended period. Hot-brewed iced coffee, by contrast, is extracted hot and then cooled. The methods can bring out different aromas. Neither is a blanket promise of less caffeine or better tolerance. Recipe, serving size and individual perception still matter.
For a Hario filter bottle, the manufacturer specifies 55 grams of coffee, approximately 700 millilitres of water and eight hours in the fridge. Observe the fill limits of your particular device. For a first experiment, a small batch makes more sense than several litres whose taste and shelf life you do not yet know.
You need a clean, suitable vessel, drinking water, ground coffee, scales and a filter. Whether a finer or coarser grind works well also depends on the filter. Very fine grounds can make later filtration harder. Check the manufacturer's recipe for your system.
Not every cold brew is a concentrate. A recipe with a lot of coffee and little water may be intended for later dilution. Other recipes produce a ready-to-drink beverage. Always note whether your quantities apply before or after dilution.
If the cup seems balanced but too strong, add a little cold water and taste again. Extra ice keeps changing the strength as you drink. For a fair comparison between two batches, use the same quantity of ice and the same dilution.
A musty or unusual smell is not a job for syrup. Discard any batch that seems off. Even an unremarkable smell does not prove unlimited shelf life. Work with small quantities, continuous refrigeration and clean equipment. Milk, pieces of fruit and other additions are best added to individual glasses, as they change the batch further.
If the coffee tastes flat, adjust the dose or steeping time deliberately next time. Do not change both at once. If there are lots of grounds in the drink, check the filter or filter it again through suitable paper if needed. Expect a different mouthfeel as a result.
Hario recommends drinking it promptly and describes a deterioration in flavour after just one to two days. This is not microbiological approval for a fixed storage period. Commercial food service requires a hygiene procedure suited to the business. These home instructions do not replace it.
Frequently asked
No. The amount depends on factors including coffee, ratio and serving size.
Yes, that is chilled hot-brewed coffee rather than Cold Brew preparation.