Milk kefir can be made with traditional kefir grains or with a freeze-dried kefir starter culture.
Both contain bacteria and yeast, so they can both make genuine kefir. The main difference is how the microorganisms are stored, maintained and transferred into the next batch.
For the complete method, including milk choice, temperature, fermentation time and troubleshooting, read our guide on how to make milk kefir at home.
How to make milk kefir at home - read the full article
What are kefir grains?
Traditional milk kefir grains are soft clusters that often look like small pieces of cauliflower.
The grains are made from:
- Natural sugars formed during fermentation
- Milk proteins
- Milk fats
- Bacteria
- Yeasts
All these parts together form the grain. The sugars, proteins and fats are not a separate coating around it. They are part of the physical kefir grain itself.
The bacteria and yeasts are attached to and held within the grain. When it is added to fresh milk, they begin a new fermentation.
After fermentation, the grains are typically strained and transferred to fresh milk. They require regular feeding and care.
Their microbial balance may gradually change because they are repeatedly exposed to different milk, equipment, storage conditions and microorganisms from the surrounding environment.
What is a freeze-dried kefir starter?
A freeze-dried kefir starter contains selected kefir bacteria and yeasts in powder form.
The culture is first produced under controlled conditions. It is then concentrated, frozen, freeze-dried, ground into powder and packed in a protected environment.
This makes it easier to store and transport than fresh kefir grains.
A freeze-dried starter also begins with a defined list of bacteria and yeasts. It does not need regular feeding before use, and there are no grains to strain.
Freeze-dried kefir starter culture
Can kefir be recultured without grains?
Yes.
The bacteria and yeasts are spread throughout the finished kefir. A few spoonfuls of plain kefir can be added to fresh milk to start another batch.
Visible grains are not required.
Small grain-like clusters may sometimes appear after repeated reculturing, but this is not guaranteed. Their absence does not mean that the kefir has failed.
Is thick kefir still kefir?
Yes.
Kefir fermented at room temperature is usually creamy but drinkable.
A suitable freeze-dried kefir starter can produce thicker, yogurt-like kefir at a warmer temperature. It remains kefir because the culture contains yeasts as well as bacteria.
Which method do you use?
Traditional grains may suit people who make kefir continuously and do not mind regular feeding and straining.
Freeze-dried starter may suit beginners, occasional kefir makers and people who prefer easier storage.
Please share which method you use, your milk, fermentation temperature and final texture.