Step 1

Grind your coffee on a very coarse setting. At least as coarse as you would use for French press or even slightly coarser.

Step 2

Add water and coffee to your mason jar.

Step 3

Seal the jar. Be careful not to overtighten the lid.

Step 4

Put your jar in a 150º F sous vide bath. Set a timer for 2 hours.

Step 5

When it's finished brewing, filter the coffee. The easiest way is to pour each jar through a Chemex filter. One Chemex filter can get you through several mason jars before it clogs and you need a new one. Any coffee filtering method will work, though.