Cold Brew Coffee Concentrate Recipe: Make and Store for Easy Use
Key Takeaways
- Cold brew concentrate uses a 1:5–1:6 coffee-to-water ratio and steeps for 12–24 hours
- Stored in the refrigerator, concentrate lasts up to two weeks
- Dilute with water, milk, or sparkling water for a variety of drinks
Cold brew concentrate is one of the smartest coffee prep habits you can build. Make a large batch on the weekend, keep it in the fridge, and enjoy café-quality cold brew every morning by pouring over ice and adding water or milk. No brewing required during the week.
This guide covers the complete process: ratios, steeping time, grind settings, straining, storage, and a handful of great serving variations.
What Is Cold Brew Concentrate?
Cold brew concentrate is cold brew brewed at double or triple strength — using more coffee per unit of water — so you can dilute it at serving time to your preferred strength.
- Regular cold brew: 1g coffee per 8–12ml water (drink as-is)
- Cold brew concentrate: 1g coffee per 4–6ml water (dilute before drinking)
The benefits of concentrate over regular-strength cold brew:
- Make a larger batch in less container space
- Customize strength on the fly by varying your dilution ratio
- Stays fresh longer (less oxidation surface area)
- Works easily as an ingredient for coffee cocktails, desserts, and baking
Basic Concentrate Recipe
Ingredients (Makes ~500ml concentrate)
- Coarsely ground coffee: 100g
- Cold filtered water: 500–600ml
Ratio: 1g coffee to 5–6ml water (1:5 to 1:6)
Cold Brew Coffee Concentrate
Total 12–24 hours steeping + 15 min prepGrind coffee coarsely — slightly finer than French press
Coarser grinds = cleaner filtration
Add grounds to a large jar or pitcher
A 1-liter mason jar works perfectly
Pour cold water over the grounds and stir to saturate
Ensure no dry pockets of coffee
Cover and refrigerate (or steep at room temperature for shorter time)
Fridge = 12–24 hours; room temp = 8–12 hours
Remove after target steeping time
Taste-test at 12 hours and adjust from there
Strain through a paper coffee filter
Filter twice for a cleaner, less cloudy result
Transfer to a clean sealed bottle or jar
Ready to use immediately or store for up to 2 weeks
Steep Time vs. Flavor
| Steep Time | Character | Best For |
|---|---|---|
| 8–10 hours | Light, bright, mild | Milk-based drinks |
| 12–16 hours | Balanced sweetness and body | General use |
| 18–24 hours | Rich, deep, strong | Black drinking; desserts |
| 24+ hours | May become bitter/over-extracted | Use with caution |
12–18 hours in the refrigerator consistently produces the best balance for most beans and preferences.
Room Temperature vs. Refrigerator Steeping Room-temperature steeping (around 20°C/68°F) is faster — 8–12 hours — and tends to produce slightly brighter, fruitier flavors. Refrigerator steeping (around 5°C/41°F) takes longer but yields a cleaner, smoother result. For safety, steep in the refrigerator if you'll be going beyond 12 hours.
Choosing Beans and Grind
Best Beans for Cold Brew
Medium to dark roasts are the traditional choice for cold brew. Cold water extraction naturally suppresses acidity, so medium-dark beans' chocolatey, nutty, or earthy flavors come through cleanly.
Brazil, Colombia, Sumatra, and Guatemala-origin coffees work particularly well. Single-origin light roasts can produce interesting results too — just expect more fruit-forward flavor with higher natural acidity.
Grind Setting
Use a coarse grind for cold brew concentrate — think roughly the size of raw sugar granules, coarser than drip but slightly finer than French press.
Too fine means:
- Over-extraction (bitter, harsh)
- Difficult straining (clogs filters)
- Murky, cloudy result
Serving Variations
Basic Dilution (1:1 to 1:2)
- Concentrate : Water = 1:1 — Strong black cold brew, short drink
- Concentrate : Water = 1:2 — Standard-strength black cold brew
- Concentrate : Milk = 1:2 — Creamy cold brew latte
Recipe Variations
Cold Brew Latte 50ml concentrate + 100ml whole milk + ice → Clean, creamy iced latte
Cold Brew Soda 50ml concentrate + 100ml sparkling water + ice → Bright, fizzy coffee soda
Vanilla Sweet Cream Cold Brew 50ml concentrate + 80ml milk + 20ml heavy cream + vanilla syrup + ice → Café-style indulgent drink
Cold Brew Tonic 50ml concentrate + 100ml tonic water + ice → Bitter-sweet grown-up iced coffee
Storage
- Container: Glass jar or bottle with a tight lid
- Temperature: Refrigerator (below 5°C / 41°F)
- Shelf life: Up to 2 weeks; best within the first week
- Flavor over time: Oxidation gradually changes flavor. Expect subtle acidity changes after day 7
Signs It's Past Its Best
- Noticeably more sour than when fresh
- Increased cloudiness or sediment
- Off or musty aroma
Discard at any of these signs.
Cold Brew Ice Cubes Pour concentrate into an ice cube tray and freeze. Drop a few cubes into milk or water for an iced coffee that stays full-strength as it melts — never gets diluted. Also excellent as a topping for vanilla ice cream.
Troubleshooting
Too bitter: Reduce steep time, or reduce coffee dose slightly
Too weak or watery: Steep longer, or increase coffee dose
Cloudy and won't clear: Filter twice through paper; lay a paper towel over a fine mesh strainer as a final pass
Gritty texture: Grind is too fine — use a coarser setting
Summary
Cold brew concentrate is one of the most efficient ways to have great coffee every day with minimal daily effort.
- Use 100g of coarse-ground coffee to 500–600ml of water
- Steep 12–18 hours in the refrigerator
- Store up to 2 weeks and dilute to taste each morning
Batch it on Sunday, and your weekday coffee routine becomes effortless.
About the Author
Coffee Guide Editorial
A team of writers and baristas passionate about coffee. We cover everything from bean selection and brewing methods to café culture.
Team Credentials
- Certified baristas
- Specialty roasting café experience
- Coffee import industry experience