Sprouting mung beans in a mason jar is a simple and rewarding process and all you will need a clean, wide-mouth mason jar, dried mung beans, and either cheesecloth or a sprouting lid. Place about 1/4 to 1/2 cup of mung beans in a jar Cover the opening with cheesecloth or a sprouting lid Soak the seeds with cold water for 12-24 hours After soaking, drain the water from the jar. Rinse the beans with fresh cold water and drain 1-2 times a day In about 3-5 days, you will see the mung beans sprouting