What Can Replace Kefir Starter for Homemade Kefir?

If you do not have powdered kefir starter for homemade kefir, the most practical substitute is plain, store-bought kefir. If no kefir is available, yogurt starter can make a different but drinkable fermented milk beverage.

How Do You Use Ready-Made Kefir as a Starter? Add 2–3 tablespoons (15 ml each) of plain, live-culture kefir to 1 liter of milk and leave it at room temperature for 24 hours. The result is very similar to kefir made with traditional grains. You can reserve some of the batch to start the next one, but the culture may weaken with each generation, so refreshing it with a new starter after a few uses is recommended.

How Does Yogurt Starter Change the Result? Yogurt bacteria differ from the combination of bacteria and yeast in kefir grains. A drink made with yogurt starter will not have kefir's characteristic light carbonation and yeasty flavor; it will be more like a thin ayran. Still, this is an easy way to make a fermented milk drink at home when neither kefir grains nor ready-made kefir is available.

Where Can You Get Kefir Grains, and Can You Store Them? Kefir grains are usually obtained from another kefir maker or a specialty seller. Once you have them, they can be added to milk regularly, strained, and propagated, and the extra grains can be frozen for months. To reuse frozen grains, change the milk for a few days to reactivate them; the first few batches may ferment more weakly than expected.

Does Fermentation Time Depend on the Starter? A batch started with store-bought kefir usually takes a little longer—24–36 hours—than one started with kefir grains to reach the desired consistency. Room temperature also affects the timing; a warm kitchen speeds fermentation. Tasting every few hours until the desired thickness and tartness are reached is recommended. Whichever method you use, the drink may be less thick and fizzy than kefir made with traditional grains. Regular use can strengthen the culture over time and bring the result closer to traditional kefir.

Is There a Backup Option if You Have No Starter? A bottle of unflavored store-bought kefir can be used as a starter even when no other culture is available. Choose one labeled as containing live cultures; some products are pasteurized in a way that kills the cultures and will not start fermentation. If the label does not mention live cultures, the attempt may not work.

Use glass or plastic rather than metal for the fermenting container, because prolonged contact between the acidic kefir culture and metal may damage the container and culture. Stirring with a wooden or food-safe plastic spoon instead of a metal spoon is recommended.