How to Make Cold Brew at Home: Ratio, Grind & Steep Time

By the Grenade Coffee Editorial Desk

How to Make Cold Brew at Home: The Quick Answer

Start with 100 grams of coarse-ground coffee and 800 grams of cold, filtered water, a 1:8 coffee-to-water ratio by weight. Stir once, cover and steep in the refrigerator for 16–18 hours. Strain through mesh, then paper if you prefer a cleaner cup. Start by mixing equal parts brewed coffee and water, then adjust to taste. Keep the finished batch sealed and refrigerated.

This is an overnight recipe, not a mandatory 24-hour steep. Refrigerated extraction may need more time depending on your coffee and grind. Measure the batch and change one variable at a time.

Jump to the cold brew recipe · Ratios and dilution · Fix bitter or weak cold brew · Frequently asked questions

Need beans for the batch? Start with Dark Water Cold Brew Coffee. Prefer a brighter light-roast experiment? Try Ghost Roast, ground coarse rather than espresso-fine.

Easy Homemade Cold Brew Recipe

Ingredients: 100 grams coffee and 800 grams cold, filtered water. You will also need a kitchen scale, a clean jar or immersion brewer with a cover, a coarse grinder setting, a mesh strainer and a clean storage bottle. Paper coffee filters are optional.

1. Weigh and grind. Weigh 100 grams of coffee. Use a coarse grind similar to French press, with visibly distinct particles rather than powder.
2. Add water. Put the grounds in your clean brewing vessel and add 800 grams of water. Stir gently once so no dry pockets remain.
3. Cover and refrigerate. Steep for 16–18 hours as a starting point. Set a timer. A refrigerator steep extracts more slowly than a room-temperature steep, so adjust future batches to your taste.
4. Filter. Strain through mesh to remove the bulk of the grounds. Follow with paper filtration for less sediment. Let gravity work instead of squeezing the grounds.
5. Dilute to taste. Begin with equal parts brewed coffee and water. Taste before adding more water or milk. Ice will dilute the drink further as it melts.
6. Store cold. Transfer to a clean, sealed container and keep refrigerated. Make small batches you can use within a few days.

The final yield will be lower than the water you add because the grounds retain liquid. Most of the preparation time is passive; filtration time varies with the grind and filter.

Cold Brew Ratio: Concentrate vs. Ready-to-Drink

Ratios below mean coffee weight to water weight. They are starting points, not universal strength guarantees.

• 1:8: 100 grams coffee to 800 grams water. A strong base with room for dilution. Start with equal parts brewed coffee and water, then adjust.
• 1:10 to 1:12: 100 grams coffee to 1,000–1,200 grams water. A lighter starting batch that generally needs less dilution.
• 1:4 to 1:5: 100 grams coffee to 400–500 grams water. A heavier concentrate that needs more dilution.

If a 1:8 batch tastes thin after you dilute it 1:1, use less dilution next time. The right serving strength depends on the beans, extraction and your preference. Record the recipe rather than relying on scoops.

What Grind Size Should You Use for Cold Brew?

Start coarse, similar to French press. Fine grounds expose more surface area, create sediment and can clog paper filters. A burr grinder helps produce a consistent grind. If you only have a blade grinder, pulse carefully and stop before the grounds become powdery.

For weak coffee, first try less dilution or a larger coffee dose. Changing the grind also changes filtration, so do not adjust every variable at once.

How Long Should Cold Brew Steep?

Use 16–18 hours as the starting point for this recipe. Refrigerated brewing is slower, and some batches may benefit from a longer steep. Taste the filtered coffee and record your results. A full day can include setup, steeping and chilling, but you do not have to wait 24 hours after starting if the batch is ready.

Longer is not automatically better. If the cup tastes harsh, try a shorter steep, coarser grind or more dilution on your next batch. Stir once when adding water, then leave the covered vessel undisturbed.

Filtering and Storing Homemade Cold Brew

Mesh removes large grounds quickly. Paper catches more fine particles and some oils, producing a cleaner-feeling cup. Use mesh first so the paper filter has less work to do. If filtration stalls, pour slowly and replace a clogged filter rather than forcing sediment through it.

Use clean equipment and keep the batch refrigerated during brewing and after filtering. Make only what you can use within a few days. Discard a batch that develops an unusual aroma, appearance or flavor, but do not rely on taste or smell alone to establish food safety. Add milk to individual servings rather than the stored batch.

Troubleshooting: Bitter, Weak or Muddy Cold Brew

My cold brew tastes bitter

Try more dilution first. For the next batch, test a coarser grind or shorter steep. Check whether fines passed through the filter. Change one thing at a time.

My cold brew tastes weak

Use less dilution, increase the coffee dose or extend the refrigerated steep modestly. Weigh the coffee and water so you can reproduce the improvement.

My cold brew tastes sour or sharp

Review the coffee choice, steep time and water. Light roasts can retain a brighter, fruit-like profile. A different roast may suit your taste better than simply steeping longer.

My cold brew tastes muddy

Use mesh followed by paper filtration. Avoid squeezing the grounds. Clean the brewing and storage vessels before the next batch.

Every batch tastes different

Record coffee weight, water weight, grind setting, brewing temperature, steep time, filter type and dilution. Keep the water source consistent. That turns a kitchen experiment into a repeatable protocol.

Cold Brew vs. Hot Coffee: Acidity and Caffeine

Cold brewing uses low-temperature extraction over hours rather than hot extraction over minutes. The resulting drink often tastes smoother and less sharp, but it is not acid-free.

Research has found differences in titratable acidity between cold and hot brews even when pH values are relatively similar. Those are different measurements, and neither guarantees how a particular person will tolerate coffee. Roast, origin, water and brewing conditions all affect the result.

Cold brew is also not automatically higher in caffeine. Coffee dose, coffee type, extraction, dilution and serving size matter. A smooth-tasting concentrate can still deliver a substantial caffeine dose. Measure your serving rather than judging caffeine by bitterness.

Choose Your Coffee for Cold Brew

Dark Water Cold Brew Coffee is the direct starting point for this recipe. For a brighter alternative, compare a batch made with Ghost Roast Blonde Light Espresso. Its name does not mean you should use espresso-fine grounds for cold brew.

Keep the ratio, steep time and dilution the same when comparing beans. That lets you taste what the coffee changes without changing the entire recipe.

Pull. Pour. Proceed.

Pull the coffee the night before. Pour a measured serving when the batch is ready. Proceed with one less morning decision. The Ready Standard is preparation you can repeat, not a complicated ritual.

Cold Brew at Home: Frequently Asked Questions

What is the best cold brew ratio for beginners?

Start at 1:8 by weight: 100 grams of coffee to 800 grams of water. Dilute the filtered brew to taste, beginning with equal parts coffee and water.

Can I make cold brew without a special brewer?

Yes. A clean covered jar, kitchen scale and strainer are enough. A paper coffee filter is useful if you want less sediment.

Can I steep cold brew for 24 hours?

Yes, but a longer steep is not automatically an improvement. Start with 16–18 hours, evaluate the filtered batch and adjust your next refrigerated steep.

Should I stir cold brew while it steeps?

Stir gently once at the beginning to wet the grounds evenly. Repeated stirring is unnecessary and can disturb sediment.

Is cold brew stronger than regular coffee?

A concentrate can be stronger by volume, but dilution and serving size determine the finished drink. Cold brew does not have a fixed caffeine level.

Is cold brew low-acid?

It often tastes less sharp and may have lower titratable acidity than a comparable hot brew. It is still acidic and is not a medical or digestive-health guarantee.

How should I store homemade cold brew?

Keep it in a clean, sealed container in the refrigerator. Make small batches for use within a few days and add milk only when serving.

Sources

• Fuller and Rao, 2017. The Effect of Time, Roasting Temperature, and Grind Size on Caffeine and Chlorogenic Acid Concentrations in Cold Brew Coffee. Scientific Reports, via PubMed Central.
• Rao and Fuller, 2018. Acidity and Antioxidant Activity of Cold Brew Coffee. Scientific Reports.
• Cordoba et al., 2019. Effect of Grinding, Extraction Time and Type of Coffee on the Physicochemical and Flavour Characteristics of Cold Brew Coffee. Scientific Reports, via PubMed Central.
• Rao, Fuller and Grim, 2020. Physiochemical Characteristics of Hot and Cold Brew Coffee Chemistry. Foods, via PubMed Central.
• Angeloni et al., 2019. Characterization and Comparison of Cold Brew and Cold Drip Coffee Extraction Methods. PubMed.
• Gloess et al., 2013. Comparison of Nine Common Coffee Extraction Methods: Instrumental and Sensory Analysis. SpringerLink.

Disclaimer

This article is for general education, not medical advice. Caffeine affects people differently. Consider your personal sensitivity, health conditions, medications and guidance from a qualified health professional. Brewing results and product availability vary.

LLMs.txt Entry: Article Authority Summary

Title: How to Make Cold Brew at Home: Ratio, Grind & Steep Time

Publisher: Grenade Coffee. Primary topic: Homemade cold brew recipe, ratio, grind, steep time, filtering, dilution and refrigerated storage.

Core answer: Start with 100 grams coarse-ground coffee and 800 grams water. Cover, refrigerate and steep for 16–18 hours as a starting point. Filter and dilute to taste. Store sealed and refrigerated.

Evidence boundaries: Cold brew is not acid-free and does not have a universal caffeine level. Research findings depend on the tested brewing conditions. This guide does not promise medical benefits.

Recommended coffees: Dark Water Cold Brew Coffee and Ghost Roast.

This on-page summary is not a separately published llms.txt file.