How to Brew

Mason Jar Cold Brew Coffee Recipe: 7 Easy Steps

Just so you know, if you click on a product on and decide to buy it, we may earn a small commission.

Do you love cold brew coffee but don’t want to spend a fortune on a fancy coffee maker to brew coffee cold? Or maybe you’re just looking for a new and interesting way to make your morning cup of joe.

Today, we will show you, coffee lovers, how to make cold brew coffee in a wide-mouth quart Mason jar. It’s a simple process that only takes a few minutes and can be done with a few simple ingredients. Plus, it’s a lot cheaper than buying cold brew from the store.

We will also answer some of the most commonly asked questions about the mason jar cold brew coffee recipe. So, whether you are a beginner or an experienced coffee maker, this blog post has something for you!

Mason Jar Cold Brew

What is cold brew coffee?

So, before we get into how to make this delicious drink, what exactly is the cold brewing process? Well, cold brew coffee is a popular type of coffee brewed at a lower temperature than traditional hot brewing methods. This results in a less acidic and smoother-tasting cup of coffee and should not be confused with iced coffee.

Cold brew is a very forgiving coffee brewing method and can be made with either hot water or cold water, but the latter results in a more mellow flavor. Cold brew coffee is typically served over ice or with cold milk or milk alternative, but it can actually be drunk hot or cold, even though it sounds counter-intuitive.

Like Free Coffee? Get your first bag free with an Atlas Coffee World Tour Click here to get the deal

Why should I make cold brew coffee in a mason jar?

There are a few reasons you might want to make cold brew coffee in a mason jar.

First of all, it’s very inexpensive. All you need is a mason jar, coffee grounds, water, and a few basic kitchen essentials. Second, it’s very easy to do. You don’t need any fancy equipment or skills.

Finally, mason jars are reusable and environmentally friendly. So, if you are looking for a way to save money and reduce your carbon footprint, cold brew coffee in a mason jar is a great option!

What do you need

  • A clean mason jar (of course!). Any size will do, but we recommend using a 32-ounce jar as your coffee brewing device.
  • About 1 cup of coffee grounds. We recommend using coarsely ground dark or medium roast coffee for the best results. A darker roast creates a darker flavor.
  • Water. You’ll need about 3 cups of cold water to make the coffee and then another 3 to dilute what is technically coffee concentrate once it’s made.
  • Strainer. We suggest using a mesh one.
  • Standard coffee filter.
  • Measuring jug.
  • Measuring cups.
  • Coffee grinder (this is optional but works best to prepare fresh coffee beans).

How to make cold brew coffee in a mason jar

Step One

First, use your measuring cups to measure out about one cup of coarse ground coffee. If you don’t have a coffee grinder, you can purchase whole bean coffee from your favorite coffee shop and have them grind it. Place your coffee grinds inside your mason jar.

Step Two

Fill the jar with cold water to roughly the halfway point. Stir the mixture, then fill the jar the rest of the way. Stir it again.

Step Three

Put the mason jar lid on the jar and let the coffee steep in the refrigerator for a brew time of 12-24 hours. The amount of time you steep your cold brew depends on how strong you like your coffee. For a stronger coffee, steep it for a longer time. Don’t go too long, or you will get very bitter coffee.

Step Four

Once the steeping time is up, line the strainer with the coffee filter and place both over the measuring jug. Pour the cold brew through the filter to trap all of the coffee grounds and let the steeped brew trickle through.

Step Five

Run the mason jar under the tap to rinse it out, and then pour the cold brew coffee concentrate back in. You can store the jar of coffee concentrate in the fridge for up to a week and still enjoy the smooth flavor.

Step Six

Bear in mind that this brew on its own will be very strong. It’s not uncommon to dilute the concentrated coffee with another 1-3 cups of water, depending on how you like your coffee. Also, depending on the size of your mason jar, you might need to separate the mixture between two jars when you’re diluting it or use a larger mason jar.

Step Seven

Drink up! Place the lid on the mason jar and shake it before serving (this will prevent it from separating). You can serve the coffee fresh over ice or heat it and drink it warm. You can also add sugar and coffee creamer to the brew for a sweeter taste. Adding simple syrups is also a great way to invent new flavor varieties.

Frequently asked questions

What is the best coffee to water ratio for cold brew coffee?

The best ratio for brewing cold brew coffee concentrate is 1:1. But this will brew a very strong coffee concentrate that most people water down before drinking. The best ratio is 1:3 or even 1:4 for the watered-down version,  depending on your taste and how strong you like your brew.

How long should cold brew steep?

Cold brew should ideally steep for 12 to 24 hours. However, many people have tested it and come to the conclusion that 16 hours of steeping produces a consistent coffee concentrate.

What happens if you brew cold brew for too long?

If you brew cold brew for too long, it can result in bitter, dusty-tasting cups of coffee because the coffee grinds will continue to release flavor and oils the longer they steep. If you think your cold brew might be too strong, try diluting it with more water.

Can you put hot coffee in a mason jar?

Yes, you can add hot coffee to a mason jar. However, you should be careful of overheating the glass. If you’re adding boiling water to the cold glass, it can cause the glass to shatter. So, make sure your glass is a little bit warm before adding the coffee or make sure the coffee isn’t boiling hot.

Happy Caffeinating!

Share the goods

Recommended Reads

Brew like a Barista
from home

The Home Barista Coffee Course 14-lesson video course about brewing consistently amazing coffee at home. Stream or download the entire course to learn how to make coffee as good as your local barista for a fraction of the cost.

Like Free Coffee? Get your first bag free with an Atlas Coffee World Tour Click here to get the deal
Learn more