How to Make Decaf Cold Brew Coffee: A Guide

Joshua Allerton
February 21, 2024

I've always been a fan of cold brew coffee for its smooth, rich flavour that's less acidic than its hot-brewed counterpart. But, as someone who's sensitive to caffeine or simply wants to enjoy coffee later in the day without affecting sleep, finding a decaf option that doesn't compromise on taste can be a challenge. That's why I've perfected the art of making decaf cold brew at home. It's surprisingly simple, cost-effective, and ensures you can enjoy a delicious cup of cold brew any time of day, caffeine-free. Let's dive into how you can make your own decaf cold brew coffee, turning your kitchen into your new favourite coffee shop.

Choosing the Right Decaf Coffee Beans

When I embarked on my journey to make the perfect decaf cold brew coffee at home, one of the key decisions I had to make was choosing the right decaf coffee beans. It's a choice that can significantly affect the taste and quality of your cold brew, so I've learned a few things along the way that might help you.

First off, it's crucial to look for beans that have been decaffeinated using the Swiss Water Process. This method is chemical-free and maintains the bean's distinctive flavours and aroma. Many brands mention the decaffeination process on the packet, so keep an eye out for that.

Another aspect to consider is the roast level. For cold brews, I've found that medium to dark roast beans works wonders. They tend to have a fuller body and richer flavour, which translates beautifully in a cold brew.

Here's a quick checklist to keep in mind when shopping for decaf coffee beans:

  • Look for the Swiss Water Process label
  • Opt for medium to dark roast
  • Check for freshness. The fresher, the better!

Where do you find these? Well, local coffee shops and specialty stores are a great place to start. They often stock high-quality, fresh beans and can provide valuable insight into their selection. Online retailers are another excellent option, offering a wide range of beans from around the world.

Choosing the right decaf coffee beans might seem like a small step, but it's a decision that has a big impact on your cold brew experience. Taking the time to select carefully means you're already halfway to enjoying a delicious cup of decaf cold brew coffee.

Grind Size and Coffee-to-Water Ratio

After picking the perfect decaf beans for your cold brew, the next step is understanding the grind size and coffee-to-water ratio. Getting these aspects right is key to brewing a cold brew that's not just good, but exceptional.

For cold brew, the grind size should be coarse, akin to raw sugar. This larger grind size ensures optimal extraction over the extended brew time, preventing over-extraction which can lead to bitterness. Here's a simple guideline to follow:

  • Grind Size: Coarse, similar to raw sugar or sea salt.

Let's talk about the coffee-to-water ratio. This is where personal taste plays a huge part, but a good starting point is a 1:8 coffee-to-water ratio. This means for every one part of coffee, you'll use eight parts of water. Don't be afraid to adjust this according to your taste preference. If you prefer a stronger brew, you might want to lean towards a 1:7 ratio, whereas for a lighter brew, a 1:9 ratio could be more up your alley. Here's a simple recipe to get you started:

  • Coffee-to-Water Ratio: 1:8 (for a balanced brew)
  1. Measure 100g of coarsely ground decaf coffee.
  2. Combine the coffee grounds with 800ml of cold, filtered water in a large jar or pitcher.
  3. Stir gently to ensure all grounds are fully saturated.
  4. Cover and leave to steep in your refrigerator for 12-24 hours, depending on how strong you like it.
  5. After steeping, strain the mixture through a coffee filter or a fine mesh sieve lined with cheesecloth to remove the grounds.
  6. Pour the filtered cold brew into a clean jar or bottle for storage.

Remember, the beauty of making decaf cold brew at home is the ability to tailor it to your taste. If your first batch isn't perfect, tweak the grind size or the coffee-to-water ratio until you hit your sweet spot. Patience and experimentation are your best friends here, and before you know it, you'll be brewing cold brew like a pro.

Brewing Process for Decaf Cold Brew

Once you've got your coarse ground decaf coffee and decided on your coffee-to-water ratio, it's time to start the brewing process. I've found the simplicity and flexibility of making decaf cold brew at home both refreshing and rewarding. Here's how I do it:

  1. Mix the Coffee and Water: In a large jar or pitcher, combine your coarse ground decaf coffee with cold or room temperature water. I stick to the 1:8 coffee-to-water ratio as a starting point. For example, for every 1 cup of coffee grounds, I'll use 8 cups of water.
  2. Stir Thoroughly: Make sure to stir the mixture well to ensure all the coffee grounds are fully saturated with water. This helps to extract the full flavor from the coffee, resulting in a richer brew.
  3. Cover and Rest: After stirring, cover the jar or pitcher with a lid or plastic wrap. I then let it rest at room temperature or in the refrigerator. The resting period is crucial for the extraction process. I usually aim for about 12-24 hours, but it's more about finding what works best for you.
  4. Filter the Brew: Once the brewing time is up, it's time to separate the coffee grounds from your deliciously smooth decaf cold brew. I typically use a fine-mesh sieve lined with a coffee filter or a cheesecloth. Another method is to use a French press, which makes the filtering process even easier.
  5. Serve and Enjoy: Your decaf cold brew is now ready to be enjoyed! Serve it over ice for a refreshing drink. Feel free to dilute it with water or milk to your taste preference. Don't forget you can also add sweeteners or flavors, like vanilla or caramel, to tweak it exactly to your liking.

The joy of making decaf cold brew at home is the ability to adjust each step to suit your personal taste perfectly. Whether you prefer your cold brew stronger or milder, take your time to experiment with the brewing time and the coffee-to-water ratio. Remember, there's no right or wrong here, just what tastes best to you.

Straining and Storing Your Decaf Cold Brew

After patiently waiting for your decaf cold brew to steep, it's time to move on to the next crucial steps: straining and storing. I've found that these steps can significantly influence the taste and quality of the final drink, so I'll guide you through them to ensure you get the best results.

Straining Your Brew

Straining is vital to remove the coffee grounds and achieve that smooth, clean taste we're after. Here's how I do it:

  1. Prepare your strainer: Whether you're using a fine-mesh sieve, cheesecloth, or a French press, make sure it's ready and set over the container you'll be storing your cold brew in.
  2. Slow and steady: Gently pour the cold brew over the strainer. If you're using something finer like a cheesecloth, you may need to do this in batches to prevent overflow.
  3. Final filtration: For an even smoother drink, consider straining twice. The second time, you can use a coffee filter which will catch any remaining fine particles.

Taking the time to strain properly can make all the difference. It's about refining the taste, ensuring that every sip of your cold brew is as delightful as possible.

Storing Your Brew

Once strained, your decaf cold brew is almost ready to enjoy. However, storing it correctly is key to maintaining its freshness and flavour. Here's what I recommend:

  • Airtight is right: Transfer your cold brew into an airtight container. I prefer glass jars with sealable lids as they don't impart any flavours and keep the coffee fresh.
  • Keep it cool: Store your cold brew in the fridge. It'll stay delicious and refreshing for up to two weeks.

These storage tips ensure that whenever I'm in the mood for a decaf cold brew, I've got a tasty, refreshing drink waiting for me. And remember, serving is just as creative as the brewing. Don't hesitate to experiment with dilution ratios, add-ins like milk, cream, or syrups, and even cocktail recipes that call for coffee. The possibility for personalisation is endless, making homemade decaf cold brew an exciting adventure every time.

Enhancing the Flavour of Your Decaf Cold Brew

When I've taken the time to prepare decaf cold brew, I always look for ways to elevate its flavour. After all, there's nothing quite like a glass of cold brew that's perfectly tailored to your taste. Here are a few methods I've found incredibly effective:

Choosing the Right Beans

First off, the coffee beans play a crucial role in the overall taste. Opting for High-Quality, Specialty Coffee Beans can significantly impact the flavour profile. I personally prefer beans with a medium roast as they tend to produce a well-balanced and smooth cold brew.

The Grinding Game

The grind size matters more than most people think. For cold brew, a Coarse Grind is what you’re aiming for. It ensures optimal extraction and prevents the brew from becoming too bitter. Here's a quick guide to get it right:

  1. Use a quality burr grinder for consistent grind size.
  2. Aim for a texture similar to coarse sea salt.
  3. Experiment with grind size until you find your perfect match.

Water Quality is Key

Don't underestimate the importance of using Filtered Water. Tap water can contain various minerals and impurities that can alter the taste of your cold brew. Filtered water, on the other hand, ensures a clean, uncontaminated base for the coffee to shine.

Customising Your Brew

Here’s where you can get creative:

  • Dilution Ratio: Start with a 1:8 coffee to water ratio and adjust to taste. Some prefer a stronger brew, while others might like it a bit milder.
  • Add-Ins: Vanilla extract, cinnamon, or even a dash of sea salt can add interesting notes to your cold brew.
  • Sweetening: If you like your coffee sweet, consider using simple syrup, as it dissolves better in cold beverages compared to granulated sugar.

Through trial and error, I’ve discovered that small adjustments can significantly affect the flavour profile of decaf cold brew. It's all about personalising the process until you find what works best for you. Whether you enjoy it straight, over ice, or with a splash of your favourite milk, there are countless ways to enjoy decaf cold brew.


Crafting the perfect decaf cold brew coffee at home is simpler than you might think. By focusing on high-quality beans, the right grind size, and pure filtered water, you're setting the stage for a delicious beverage. Remember, the beauty of cold brew lies in its versatility. Don't be afraid to experiment with dilution ratios, add-ins, and sweeteners until you find your ideal concoction. It's all about personalising your coffee experience to suit your taste. So go ahead, give it a try and enjoy a refreshing cup of decaf cold brew, just the way you like it.

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