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How to Make Cold Brew in a Mason Jar

Coffee, water and a mason jar is all you need to make this incredibly easy and amazingly delicious cold brew coffee.
Prep Time2 mins
Brew Time18 hrs
Course: Drinks
Cuisine: American
Keyword: cold brew
Servings: 1 serving

Equipment

  • Mason jar, 16 oz or larger
  • Strainer, cheese cloth or coffee filter

Ingredients

  • 40 grams coffee coarsely ground
  • 320 grams water around 11oz

Instructions

  • Coarsely grind coffee. I use a "10" setting on my Fellow Ode or "35" on Baratza Virtuoso. Because of the long brew time, you want to keep your coffee ground coarse to avoid over extraction.
    Ground coffee | How to Make Cold Brew in a Mason Jar
  • Add 40 grams of ground coffee to the bottom of the mason jar.
    Add coffee | How to Make Cold Brew in a Mason Jar
  • Add 320 grams of water (ideally filtered) to the mason jar.
    Add water | How to Make Cold Brew in a Mason Jar
  • Gently stir coffee and water to make sure all of the coffee is saturated with water. You do not want any coffee grounds sitting on top of the water.
    Stir gently | How to Make Cold Brew in a Mason Jar
  • Twist a lid lightly onto the jar and set on the counter to brew. Brew time can be anywhere from 12-24 hours, though I have found 18 hours to be a perfect amount of time.
    Add lid | How to Make Cold Brew in a Mason Jar
  • After brewing, strain the brewed coffee from the mason jar into a glass or second jar. You can use a strainer, cheese cloth or even a coffee filter to strain the coffee.
    Strain coffee | How to Make Cold Brew in a Mason Jar
  • Add ice, milk or water to taste. The final cold brew in this recipe is a bit stronger, so you have the flexibility to dilute as necessary. Enjoy the cold brew right away or store in the fridge for up to a week.
    Add ice | How to Make Cold Brew in a Mason Jar

Notes

  • You always want to add your coffee to the mason jar first and pour the water on top to make sure the coffee gets fully saturated. Adding the water first and pouring the coffee on top makes it hard to mix the two.
  • You can easily scale this recipe up or down. I like this amount because it fits perfectly in a 16 oz mason jar.
  • You can leave your mason jar on a counter or in the fridge during brewing. If you leave it in the fridge, I'd recommend brewing for the full 24 hours.