Kefir is a fermented dairy product that tastes tangy and is packed with healthy probiotics. We'll teach you how to make kefir in our step-by-step tutorial.
Combine the grains with the milk in a glass pint jar.
Put the lid on the jar (it should be secure, but not tight), and let rest at room temperature.
Carefully open the jar after 8-12 hours and test for thickness and flavor. The longer you let the kefir ferment, the thicker and more tangy it will be.
When you are happy with the kefir, strain out the grains.
Pour the strained kefir into a bottle. You can now use the grains to make more kefir in a clean jar with fresh milk.
Notes
When using kefir grains, be sure to only use glass, plastic, and stainless steel. Other reactive metals can kill your kefir grains.