Recipe: Mason Jar Cold Brew Coffee

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Cold brew coffee is my dirty little morning secret: It’s easy, it’s strong, it’s versatile, and it’s a whole lot smoother and less acidic than hot brewing methods. In short, served hot or cold, it makes a damn fine cup of joe with no fancy equipment needed. (Plus, cold brew concentrate is way, way stronger than regular coffee.) Intrigued? Give it a try!

This recipe will make about 2 cups of coffee concentrate, which, depending on how strong you like your coffee, will be enough for 2 to 4 drinks.

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Please note that the links to supplies and tools that are provided below are affiliate links, and I will be compensated if you choose to make a purchase after clicking through.

Supplies:
* ⅓ cup of your favorite coffee, coarsely ground
* Coffee filter
* 2½ cups of water

Tools:
* 2 quart-sized wide mouth mason jars with lids
* Mug-sized tea infuser

Now, before we get started, I should mention that, like many recipes of this sort, there are a whole lot of right ways to make cold brew coffee. This method happens to work wonderfully for me (and for many of my pals), but it certainly isn’t the only way to get the job done. The key ingredients here are time, coffee, and water, so feel free to play around until you find what works best for you.

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Step 1
Measure out ⅓ cup of your favorite coarsely ground coffee. (I grind my own, but you can ask for your beans to be coarsely ground at your local supermarket/coffee shop if you’d rather not do it yourself.)

Update – A note on coffee grinding: For this recipe, the coffee grounds should be slightly courser than you’d usually get in a standard package of pre-ground coffee beans. It should not, however, have a chunky or gravely appearance. If you’re grinding your own coffee, stop grinding just as the texture of the beans becomes smooth and uniform.

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Step 2
Pour 2½ cups of water into the first mason jar, adding the ground coffee on top.

Place the lid on the jar, then set the closed jar on the counter and allow the coffee to brew overnight. (I generally brew for 8 to 12 hours, but up to 24 hours is fine for folks who really like strong coffee.)

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Step 3
Once the coffee has brewed overnight, it will need to be filtered to separate the coffee concentrate from the grounds. To ready your filter, rest the tea diffuser on the mouth of the second mason jar, then place a coffee filter inside the infuser. To avoid tearing, make sure that the bottom of the coffee filter is pressed firmly against the bottom of the tea diffuser.

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Step 4
Slowly pour the brewed coffee concentrate through the filter and into the second mason jar, discarding the grounds when all of the liquid has been transferred to the second jar.

The concentrate is now ready to be used. It can be poured over ice, heated up, or stored in the refrigerator until later. (The concentrate will keep for several days in the fridge.)

Tip: I quickly wash the first mason jar and the tea infuser each morning right after I filter my concentrate, which means that they’re always clean and ready when I prepare my cold brew before bed. If you ask me, there’s nothing worse than having to do dishes when you’d rather be sleeping!

Recipe: Mason Jar Cold Brew Coffee | The Zen of Making

Step 5
Dilute the coffee concentrate as desired with water or your favorite milk beverage, then add sugar or simple syrup as needed.

On warm days, I generally mix chilled cold brew with soy milk and simple syrup, sometimes adding a touch of vanilla extract. When it gets cooler, I heat up my soy milk and cold brew on the stove, then I pour the mixture into a mug with a few chocolate chips in the bottom.

Diluting your cold brew: If you’ve never tried cold brew coffee before, be warned that the coffee concentrate in this recipe is quite strong, especially if you’re using a longer brew time. Even if you’re a heavy coffee drinker, I’d recommend starting with a 1:1 or 2:1 ratio of coffee concentrate to water/milk, then adjusting the ratio from there until you reach the right strength for you. (My ratios are just a guideline. To make sure that you don’t dilute too much, you can always take a sip of the undiluted coffee, then add water/milk from there.) I can tell you from experience—namely, an ill-fated 4pm coffee break that turned into a sleepless night of watching Law & Order reruns—that this cold brew ain’t messin’ around.

Update for lovers of strong coffee: If you like your brew dark and strong, you can go ahead and disregard my warnings above. To get the strongest brew, see my note on grinding the coffee beans in step 1, then allow the coffee to brew for at least 12 to 24 hours. Before diluting, test the coffee out at full strength, then go from there.

Want to skip the paper filter next time? Check out this reusable coffee bag tutorial that I wrote for CRAFT.


5 thoughts on “Recipe: Mason Jar Cold Brew Coffee

  1. Another bonus of this method? It cuts down on the coffee smell if you happen to live with someone who can’t stand the smell of coffee brewing. I cold-brew my coffee all the time, just to keep my spouse from complaining ;-)

    I use a coffee press for mine, and transfer to a mason jar after it’s brewed. I have a jar of regular and a jar of decaf going most days – at this time of year, the decaf is great for iced coffee before bed!
    Lisa Clarke recently posted..Spiffying up

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  3. Great article and exactly what I was looking for.

    One question though. How long does the cold brew last for? (Or how long would you be willing to let it sit?)

    I.E I might make a double batch, which would last for 8 drinks for me and if I’m just having 1 every morning will the 8th drink stagnate or be just as good as the first?

    • I usually make two servings at a time (I like my coffee strong, so I don’t dilute my cold brew), and I generally drink it within 5 days.

      My five day rule is more of a personal comfort thing than a concrete answer. I haven’t really pushed it longer than that, but I’ve certainly heard of people making one large batch ahead of time for the week. (I can tell you that I’ve found a forgotten batch in the back of the fridge after returning from a long trip, and it does eventually develop visible mold on the top after a couple of weeks.)
      Haley Pierson-Cox recently posted..Tiny Cranky Haley: Knitting and Cat Farts

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