How to Make Cold Brew Coffee: Freshness & Storage Tips

I've always been a fan of cold brew coffee for its smooth, rich flavour and the way it perfectly hits the spot on a warm day. Making it at home might seem daunting, but I'm here to show you it's simpler than you think. You don't need to be a barista or have fancy equipment to enjoy this refreshing beverage right from your kitchen.

With a few basic tools and some patience, you'll soon be sipping on your own homemade cold brew, saving you trips to the coffee shop and a few quid in the process. Let's dive into the world of cold brew coffee together, and I'll guide you through each step to ensure your brew is nothing short of perfection.

Selecting the Right Coffee Beans

Choosing the right beans is crucial for the perfect cup of cold brew. It can make or break the flavour, so here's how I zero in on the best beans for my brew.

Firstly, opt for medium to dark roast coffee beans. These roasts bring out a rich, smooth flavour that's ideal for cold brewing. If you're unsure, look for beans specifically labelled for cold brew; many roasters now offer blends designed for this method.

Secondly, freshness matters. I always check the roast date and go for the freshest beans possible. Remember, fresher beans equal more flavourful coffee.

Lastly, consider the origin. Beans from different regions offer unique flavour profiles. For a fruity and floral note, I lean towards African beans. For a chocolatey, nutty flavour, South American beans are my go-to. Experimenting with different origins can help you find your perfect match.

Here's a simple recipe to turn those carefully selected beans into a delicious cold brew:

  1. Grind Your Beans - Aim for a coarse, even grind. About 1 cup of beans should do for a standard batch.
  2. Mix with Water - Combine your grounds with 4 cups of cold or room temperature water in a large jar or pitcher. Ensure all the grounds are fully submerged.
  3. Steep Overnight - Cover and let it sit at room temperature or in your fridge for 12-24 hours. The longer it steeps, the stronger the flavour.
  4. Strain Thoroughly - Use a coffee filter or a fine-mesh sieve to separate the grounds from your brew. I sometimes strain twice to ensure a smooth texture.
  5. Serve and Enjoy - Dilute your cold brew concentrate with water or milk to taste. Serve it over ice for an extra refreshing drink.

Adjust the ratios and steeping time until you find your perfect brew. It's all about personal taste, so don't be afraid to tweak it to your liking.

Grinding the Coffee to Perfection

When it comes to making cold brew, the grind size of your coffee beans can make a world of difference. I've discovered through trial and error that a coarse grind works best. This ensures optimal extraction without overdoing it, which can lead to a bitter taste. Let me walk you through the steps to grind your coffee to perfection.

  1. Select the Right Grinder: A burr grinder is your best bet for a consistent coarse grind. Unlike blade grinders, burr grinders crush the beans to a uniform size, which is crucial for cold brewing.
  2. Measure Your Beans: The coffee-to-water ratio is significant. I typically go for a 1:8 coffee-to-water ratio for a balanced strength. If you like your cold brew stronger or milder, feel free to adjust.
  3. Grind the Beans: Pour your measured beans into the grinder and set it to the coarse setting. If your grinder has specific settings for French press, that's usually a good starting point.
  4. Check the Consistency: After grinding, your coffee should resemble coarse breadcrumbs or sea salt. If it’s too fine, it will over-extract during the steeping process. If it's too coarse, you might end up with a weak brew.
  5. Adjust if Necessary: Don’t hesitate to adjust the grind size based on your first batch's taste. Making cold brew is an art as much as it is a science, and personal preference plays a huge role.

Remember, the freshness of your beans is equally crucial. Always go for the freshest beans you can find, as they'll give your cold brew a vibrant and complex flavor profile that can't be beaten. Once you have your freshly ground coffee, you're ready for the next step: steeping.

Brewing the Cold Brew Concentrate

Once I've got my coarse ground coffee ready, Brewing the Cold Brew Concentrate is where the magic really begins. It's a simple process, but don't be fooled; the devil is in the details. Here’s how I do it in a way that’s straightforward and allows for some personal tweaking.

What You’ll Need:

Steps to Brew Perfection:

  1. Measure Your Ingredients: I stick to a 1:8 coffee-to-water ratio. For every 1 gram of coffee, I use 8 grams of water. If I’m making a big batch, I’ll use 100 grams of coffee to 800 grams (or ml) of water.
  2. Mix Coffee and Water: In my jar or pitcher, I combine the ground coffee with cold, filtered water. I make sure all the grounds are fully immersed. This is crucial for even extraction.
  3. Let it Steep: I cover the container and let it steep at room temperature. The ideal time is around 16 to 24 hours. I've found that this range gives the cold brew its distinctive smooth and bold flavour.
  4. Strain the Brew: Once steeping is done, I strain the mixture using a fine mesh strainer lined with a cheese cloth. This ensures a clean and sediment-free concentrate. Some prefer a French press for this step, which also works well.
  5. Store the Concentrate: I pour the strained concentrate into a clean bottle or jar. Stored in the fridge, it can last up to two weeks, maintaining its robust character and refreshing taste.

What's so satisfying about cold brew is not just its taste but also the simplicity of making it. Once the concentrate is done, I have a versatile base that's ready to be transformed into an array of chilled coffee delights, depending on how I choose to dilute and serve it.

Diluting and Serving Your Cold Brew

Once you've mastered the art of crafting the perfect cold brew concentrate, it's time to turn your attention towards diluting and serving it. Cold brew coffee is versatile, and how you serve it can dramatically alter its taste and intensity. Here's a step-by-step guide on how to dilute and serve your cold brew, ensuring that every cup is nothing short of delightful.

Firstly, remember that the concentrate you've created is potent. Directly drinking it can be overwhelming due to its strong flavor and high caffeine content. The beauty of cold brew concentrate lies in its ability to be diluted without losing its rich taste. Here's how I like to do it:

To serve, I always ensure my cold brew is as fresh as it can be, and I recommend consuming it within a week from brewing. This timeframe helps maintain its peak flavor, ensuring every sip is as satisfying as the first.

By following these simple steps, you'll find yourself enjoying a perfectly balanced and deliciously smooth cup of cold brew coffee. Whether you're starting your day with a refreshing jolt of caffeine or looking for a mid-afternoon pick-me-up, these tips will ensure your cold brew is always served just the way you like it.

Storing Your Cold Brew Properly

After mastering the art of making the perfect cold brew coffee, it's essential that I explain how to store it properly. Trust me, nothing's more disappointing than a batch of cold brew that's lost its charm because it wasn't stored right. Luckily, keeping your cold brew fresh and flavourful is simple with a few handy tips.

First off, always store your cold brew in the fridge. Cold brew concentrate is perishable and best enjoyed when kept cold. Storing it at room temperature can lead to bacterial growth and a sour taste, which is not what we're after.

Here’s a quick guide to ensure your cold brew remains fresh:

When stored properly, cold brew concentrate can last up to two weeks in the fridge. However, for the best taste experience, I recommend consuming it within a week. This timeframe ensures that the bold flavours and delicate nuances of the coffee are still at their peak.

Remember, the key to enjoying a delicious cold brew every time lies in both how you make it and how you store it. By following these simple storage tips, you’re ensuring that every cup of cold brew you pour is as fresh and flavourful as possible.


Mastering the art of cold brew coffee isn't just about the brewing process; it's also about how you store it. I've shared my top tips to help you keep your cold brew fresh and full of flavour. Remember, the key is to use an airtight container and keep it refrigerated. Stick to these guidelines, and you'll be set to enjoy a delicious cup of cold brew any day of the week. Trust me, once you've tasted the difference, you'll never want to go back. Happy brewing!

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