Cheese Culture for Yogurt & Kefir
Yogurt splits in two: thermophilic cultures that need a warm incubator, and mesophilic heirlooms (viili, filmjölk, matsoni) that set on the counter but must be re-cultured at least every 7 days. Kefir grains out-strain any powder and live indefinitely with care; powdered kefir starter is the finite, convenient version. Greek yogurt is strained yogurt — same culture, less whey.
At a glance
| Family | Cultured dairy · Thermo or meso |
| Primary culture | Thermophilic yogurt culture (heated milk) or mesophilic heirloom cultures (room temp) |
| Adjuncts | Kefir grains are a living heirloom culture of their own |
| Temperature logic | Heated-milk yogurt incubates around 110°F; mesophilic yogurts and kefir culture at room temperature |
| pH notes | Set at about pH 4.6 |
| Ageing | Yogurt sets in about 5–12 hours; kefir grains transfer to fresh milk roughly every 24 hours |
The shopping list
Yogurt Starter Cultures — Sweet, Creamy & Bulgarian
The make, in short
Heated-milk yogurt incubates around 110°F; mesophilic yogurts and kefir culture at room temperature. Yogurt sets in about 5–12 hours; kefir grains transfer to fresh milk roughly every 24 hours.
The one pitfall
Letting an heirloom culture sit unfed past a week and expecting it to survive. Heirlooms are pets, not packets.
Making a different cheese next?
The Culture Finder covers 27 cheeses and cultured staples — starter, adjuncts, temperature logic and pH gates for each.