Table of Contents
What is Cold Brew Coffee?
Cold brew coffee has taken the UK by storm in recent years, and for good reason. Often confused with iced coffee, cold brew is actually a different brewing method, not just coffee served cold. Iced coffee typically involves brewing hot coffee and then chilling it, often over ice. Cold brew, however, is steeped in cold water for an extended period. This process results in a remarkably smoother, less acidic flavour profile – around 65-75% less acidic than hot brewed coffee. The origins of cold brew can be traced back to Kyoto-style coffee in Japan, but its popularity has surged globally thanks to its refreshing taste and ease of making at home.
Why Make Cold Brew at Home?
There are several compelling reasons to embrace home cold brewing:
- Cost Savings: Buying pre-made cold brew from cafes or supermarkets can quickly add up. A single bottle can easily cost £3.50 – £5.00. Making your own significantly reduces the cost per serving.
- Control Over Ingredients: You get to choose your favourite coffee beans, ensuring you’re using high-quality, ethically sourced options.
- Flavour Customisation: Experiment with different beans, ratios, and steeping times to create a cold brew that perfectly suits your palate.
- Convenience: Once brewed, you have a concentrate ready to go, meaning cold brew is always on tap whenever you fancy it.
Choosing the Right Coffee Beans
While you can use any coffee beans for cold brew, some perform better than others. Generally, medium to dark roast beans are recommended. These roasts tend to extract more flavour during the long, cold steeping process. Lighter roasts can sometimes result in a weak or underwhelming brew.
Grind Size: This is crucial! You need a coarse grind – think French press consistency. A fine grind will result in a muddy, over-extracted brew.
Single-Origin vs. Blends: Both work well. Single-origin coffees can offer unique flavour profiles, while blends provide a more balanced and consistent taste. Experiment to find what you prefer. For example, a Sumatran single-origin coffee would lend earthy notes, while a Brazilian blend might offer chocolatey sweetness.
Essential Equipment
You don’t need a lot of fancy gear to get started, but here’s a breakdown of what you’ll need:
- Coffee Grinder: A burr grinder is highly recommended for consistent grind size. Blade grinders produce uneven results.
- Brewing Container: Options include a French press, a large mason jar, or a dedicated cold brew maker.
- Filter: You’ll need a way to filter out the coffee grounds. Options include paper filters, metal filters, or cheesecloth.
Recommended Products (2026)
| Product | Price (£) | Key Features |
|---|---|---|
| OXO Brew Conical Burr Coffee Grinder | 180.00 | Consistent grind, adjustable settings, easy to clean. |
| Bodum Chambord French Press (1L) | 40.00 | Classic design, durable, affordable. |
| Hario Mizudashi Cold Brew Coffee Pot | 35.00 | Specifically designed for cold brew, easy to use and clean. |
| KitchenAid Cold Brew Coffee Maker | 75.00 | Large capacity, easy to pour, stylish design. |
| Wilfa Svart Aroma Coffee Grinder | 150.00 | Precise grind settings, sleek Scandinavian design. |
Cold Brew Coffee Ratios: Finding Your Perfect Strength
A standard starting point is a 1:8 coffee-to-water ratio. This means 1 part coffee grounds to 8 parts water (by weight). For example, 100g of coffee to 800ml of water.
Adjusting the Ratio:
- Stronger Brew: Use a 1:6 or even 1:4 ratio.
- Weaker Brew: Use a 1:10 or 1:12 ratio.
Measurements:
- 100g Coffee : 800ml Water
- Approximately 3.5oz Coffee : 27fl oz Water
Brewing Methods: Step-by-Step Guides
1. French Press Method
- Grind 100g of coffee coarsely.
- Add the coffee grounds to your French press.
- Pour in 800ml of cold, filtered water.
- Stir gently to ensure all grounds are saturated.
- Cover and steep for 12-24 hours at room temperature.
- Slowly press the plunger down.
- Filter again through a paper filter if desired.
2. Mason Jar Method
- Grind 100g of coffee coarsely.
- Add the coffee grounds to a large mason jar.
- Pour in 800ml of cold, filtered water.
- Stir gently to ensure all grounds are saturated.
- Cover with a lid or cheesecloth.
- Steep for 12-24 hours at room temperature.
- Strain the coffee through a paper filter or cheesecloth.
3. Hario Mizudashi Method
- Place the Hario Mizudashi filter into the pot.
- Add 100g of coarsely ground coffee to the filter.
- Pour in 800ml of cold, filtered water.
- Stir gently.
- Cover with the lid and steep in the refrigerator for 12-24 hours.
- Remove the filter.
Brewing Time & Steeping
The optimal steeping time is typically between 12 and 24 hours. Shorter steeping times (12-16 hours) will result in a lighter, brighter brew. Longer steeping times (18-24 hours) will produce a bolder, more concentrated flavour.
Factors Influencing Steeping Time:
- Temperature: Warmer temperatures will extract flavour faster, so you may need to shorten the steeping time.
- Grind Size: A very coarse grind may require a longer steeping time.
How to Tell When It’s Ready: Taste it! Start tasting around 16 hours and see if it’s to your liking.
Filtering Your Cold Brew Concentrate
Filtering is essential to remove the coffee grounds and create a smooth final product.
| Filter Method | Pros | Cons |
|---|---|---|
| Paper Filter | Provides the cleanest brew, removes most sediment. | Can be slow, may remove some flavour oils. |
| Metal Filter | Reusable, allows more flavour oils to pass through. | May allow some sediment to pass through. |
| Cheesecloth | Cheap and readily available. | Can be messy, may not remove all sediment. |
Serving Suggestions & Recipes
Cold brew concentrate is incredibly versatile:
- Dilution: Dilute the concentrate with water or milk to your desired strength (typically a 1:1 or 1:2 ratio).
- Over Ice: Serve over ice for a refreshing drink.
- Cold Brew Latte: Combine cold brew concentrate with steamed milk and a touch of sweetener.
- Cold Brew Mocha: Add chocolate syrup or cocoa powder to your cold brew latte.
- Cold Brew Tonic: Mix cold brew with tonic water for a unique and bubbly drink.
Flavour Additions: Experiment with vanilla extract, cinnamon, cardamom, or other spices to enhance the flavour.
Storing Cold Brew
Proper storage is crucial to maintain freshness. Store cold brew concentrate in an airtight container in the refrigerator. It will typically last for up to 2 weeks.
Freezing: While possible, freezing cold brew is not ideal. It can alter the texture and flavour. If you do freeze it, use ice cube trays for individual portions and thaw in the refrigerator.
Troubleshooting Common Cold Brew Problems
- Weak Brew: Use a higher coffee-to-water ratio, steep for a longer time, or use a finer grind (though be careful not to go too fine!).
- Bitter Taste: Use a coarser grind, shorten the steeping time, or try a different coffee bean.
- Sediment: Use a finer filter, or double-filter the concentrate.
FAQ
- Q: What’s the best water to use for cold brew?
A: Filtered water is always recommended. Avoid using tap water with strong chlorine or mineral flavours. - Q: Can I use pre-ground coffee?
A: While you can, freshly ground coffee is always best for optimal flavour. - Q: Is cold brew the same as Japanese iced coffee?
A: Not exactly. Japanese iced coffee involves brewing hot coffee directly over ice, resulting in a different flavour profile. Cold brew is steeped cold for a longer period. - Q: How can I make a nitro cold brew at home?
A: You’ll need a nitro cold brew dispenser (around £150 – £250) and a nitrogen cartridge to infuse your cold brew with nitrogen bubbles for a creamy texture. - Q: Can I reheat cold brew?
A: Yes, but it’s generally not recommended. Reheating can alter the flavour and negate the low acidity benefit. It’s best enjoyed cold!