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How to Make Cold Brew in a Mason Jar (Easy, Affordable & Delicious)

Brew Coffee Like a Pro (No Machine Required)

If you're tired of spending a fortune on cold brew from your favorite café, here's a secret: you can make it at home using just a mason jar, your favorite coffee, and water. That's right—no expensive equipment, no barista skills needed.

This method isn’t just cost-effective—it produces cold brew that's:

  • Low in acidity

  • Smooth in flavor

  • Naturally sweet

  • Perfect for summer or meal-prepping coffee in batches

Whether you’re a coffee beginner or an iced coffee fanatic, this guide will show you exactly how to make cold brew in a mason jar, step by step—plus pro tips, FAQs, and flavor hacks.

How to Make Cold Brew in a Mason Jar

What You'll Need (No Fancy Equipment!)

Before we begin, grab these basics from your kitchen:

  • 1 mason jar (preferably 32 oz, but 16 oz works too)

  • Freshly ground coffee (coarse or medium-coarse grind)

  • Filtered water (for a clean brew)

  • Strainer or cheesecloth (to separate the grounds)


    Want stronger results? Use Robusta coffee instead of Arabica. It delivers a bolder taste and nearly double the caffeine.

Cold Brew Coffee incidents

Cold Brew Coffee Ratio for Mason Jar Method

The ideal cold brew strength depends on whether you're making a ready-to-drink version or a concentrate.

Brew Type

Coffee Grounds

Water

Ready-to-Drink

1/2 cup

2 cups

Concentrate

3/4 to 1 cup

2 to 2½ cups

For a 32 oz mason jar, we recommend:

  • ¾ cup coarse coffee grounds

  • 3 cups filtered water


 How to Make Cold Brew in a Mason Jar – Step-by-Step


Step 1: Add Coffee to the Jar

Measure your ground coffee and pour it into the mason jar.Use a coarse grind to avoid bitterness and clogging the strainer later.

Step 2: Add Water

Slowly pour in your filtered water. Stir with a spoon or chopstick to fully saturate the grounds.

Step 3: Seal and Steep

Close the jar with the lid and place it in the fridge (or leave it at room temperature).Let it steep for 12 to 24 hours. The longer it brews, the stronger and richer it will be.

Step 4: Strain the Cold Brew

Using a fine mesh strainer, cheesecloth, or paper coffee filter, strain the mixture into a clean jar or pitcher. Discard the grounds.

Step 5: Serve and Store

Pour over ice and enjoy!You can store the cold brew in your fridge for up to 7–10 days.

 How to Make Cold Brew in a Mason Jar – Step-by-Step

Want It Stronger? Make Cold Brew Concentrate

If you prefer a bolder, espresso-like cold brew, learn how to make a stronger base using this guide:👉 How to Make Cold Brew Coffee Concentrate at Home (Strong, Smooth & Simple)

It’s ideal for those who like creamy iced lattes or want to dilute with milk without losing flavor.


Expert Tips for the Perfect Brew

  • Always use filtered water for cleaner flavor

  • Grind fresh beans for maximum aroma and taste

  • Double strain for ultra-smooth texture

  • Flavor naturally with cinnamon sticks, vanilla extract, orange peel, or even cacao nibs during steeping

  • Dilute 1:1 with water or milk if using cold brew concentrate.


For a Lighter Caffeine Option…

Want a smooth drink but without the strong caffeine hit? You’ll love this refreshing recipe:👉 How to Make an Iced Matcha Latte (Better Than Starbucks!)It’s energizing, earthy, and gut-friendly—perfect for hot afternoons or coffee alternatives.


Final Thoughts: Why Mason Jar Cold Brew Just Works

Making cold brew in a mason jar is more than a coffee hack—it’s a lifestyle upgrade.It’s:

  • Affordable

  • Customizable

  • Low-effort

  • Flavor-packed

And best of all? No more overpaying for bottled brews. You can control the strength, flavor, and quality—all from the comfort of your kitchen.

So grab your mason jar, scoop those grounds, and let time do its magic.

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