Thick & spoonableYogurt Starter Culture
Traditional Bulgarian · 10 × 1 g sachets · up to 10 litres
Made in Bulgaria · One sachet sets one litre · Ships from Sofia
Kefir culture
Traditional Balkan · 10 × 1 g sachets · up to 10 litres
A traditional kefir culture — an active bacterial and yeast culture of Lactococcus lactis subsp. lactis and subsp. cremoris and Leuconostoc mesenteroides subsp. cremoris, with kefir grains — in single 1 g sachets.
Kefir sets at a lower temperature and for longer than yogurt, and comes out lighter, with a gentle tang.
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Delivered in Bulgaria by Econt — to an office, a locker or your address.





Boil 1 litre of fresh milk, then let it cool to 35–40 °C. If the milk is already pasteurised, just heat it to 35–40 °C.
Pour in one sachet and stir for 3–4 minutes so the culture spreads evenly.
In a yogurt maker: 12–14 hours at 35–40 °C. The traditional way: wrap the covered pot or jar in a blanket to keep it at that temperature for 12–14 hours.
Refrigerate at 8–10 °C for 6–7 hours.
Kefir stays lighter than yogurt — stir it and drink it as it is, or blend it with fruit.
The yogurt starter uses Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus; it sets at 42–45 °C in 7–8 hours into thick, spoonable yogurt. The kefir starter is a bacterial and yeast culture based on Lactococcus lactis; it sets at 35–40 °C in 12–14 hours into a lighter, drinkable kefir. Neither needs special equipment.
Whole cow's milk gives the thickest, creamiest result. Pasteurised milk only needs warming; raw milk should be boiled and cooled first; UHT milk works but sets a little thinner; skimmed milk sets thin. Plant milks can ferment, but results vary a lot — full-fat oat or soy milk work best, so try a small batch first.
Up to about a week in a clean, closed container in the fridge; it gets slowly tangier. Throw it away if it smells off or shows any coloured mould.
In a dry and dark place at up to 20 °C, away from the cooker, the dishwasher and direct sun. They do not need the fridge. The best-before date and batch number are printed on the box; shelf life is 24 months from production.
Thick & spoonableTraditional Bulgarian · 10 × 1 g sachets · up to 10 litres
One of eachOne box of each · 20 × 1 g sachets · up to 20 litres
Questions about the cultures, a batch that did not set, or working with us? Write to us — we answer within one working day.