Cold brew in the fridge overnight in mason jars.
Put 2 or 3 inches of water into a large pot.
Add a metal grate or a couple layers of mason jar rings to the bottom of the pot. You don't want your jars of coffee to be in the water.
Bring the water to a boil then turn the heat down so that it's still simmering.
Put your sealed jars of coffee in the pot and close the lid. Leave them in for around 10-20 minutes.
Steam sterilized shelf stable cold brew.
You could also use retort pouches, but that seems like it could be messy.
(post is archived)