I used one of my 32oz mason jars and these plastic lids to make my husband some cold brew using Death Wish Coffee. It’s actually pretty simple. For every 1 1/2 cups of cold water, add 1/3 cup medium-course coffee grounds. Stir together in the jar and cover. Let rest at room temperature (or in the fridge) overnight or for 12 hours minimum.
I placed a large bowl under my coffee grinder and ground up about 1 cup of medium-course coffee. I filled the mason jar up to the 3 cup line and added in 2/3 cup of the coffee grounds. Stir together and let sit overnight at room temperature or in the refrigerator if you prefer… you must let is sit for a minimum of 12 hours.