This will create sour milk, which makes an excellent Greek yogurt substitute. Similar to buttermilk, use less sour milk than the amount of Greek yogurt that your recipe calls for (about 1/4 less).
The grains’ lactic acid bacteria turn the milk’s lactose into lactic acid. This is what makes kefir taste sour like yogurt — but it has a thinner consistency. In addition, kefir has about ...
milk and more. You might be surprised by what you can substitute for everyday items when baking and cooking. For example, did you know mayonnaise, sour cream and Greek yogurt are interchangeable?