🧫 Starter culture
Also known as: starter, fermentation starter
A bacterial culture for fermented dairy products.
A starter culture is made of live, helpful microbes that are added to milk so that it sours “the right way.” Most often these are lactic acid bacteria, sometimes together with yeast. Without a starter, you cannot make yogurt, kefir or most cheeses. A starter contains both the microbes and the medium they grow in: milk, grain or a nutrient liquid.
A starter works in a simple way. The bacteria eat lactose, the sugar in milk, and give off lactic acid. The milk turns sour and thickens. The acid also stops harmful microbes from growing, so fermented milk products keep longer than fresh milk. The mix of bacteria sets the taste, smell and thickness of the product: yogurt, kefir and sour cream each have their own starter.
Starters are not only for milk. Sourdough bread, wine and soy sauce have their own starters. In many countries they have old local names: levain in France, koji in Japan. Today dairy plants buy ready-made starters with a precisely known make-up. At home, people sometimes follow the old way and add a spoonful of the last batch of yogurt or kefir to new milk.
How it connects to milk
🧫 Starter culture → needed for → 🔄 Fermentation → gives → 🥣 Tvorog → made from → 🥛 Milk
Links
- Needed for
- 🔄 Fermentation
- What is needed
- 🧫 Lactic acid bacteria
- Wine and milk
- 🍷 Fermentation, 🍷 Cultured yeast
Frequently asked questions
What is the difference between a starter culture and yeast?
Yeasts are fungi, while a dairy starter is made mostly of bacteria. Bacteria make lactic acid, while yeasts mostly make alcohol and carbon dioxide.
Can you make yogurt without a starter?
No. Yogurt is made only thanks to bacteria. You can get them from a ready-made starter or from a spoonful of live yogurt.