
Crème Fraiche is simply cultured (fermented) cream. But its thickness, its creaminess, and its mild tartness is anything but simple. It is a wonderful, traditional fermented food similar to sour cream, but with a higher fat content.
Place your starter in a quart Mason jar.
Add the raw cream.
Close the jar and shake it so that the starter mixes well with the cream.
Keeping the lid loose, place the jar somewhere warm for about 12 hours.
Check the cream. If it has not yet thickened, leave it for another 6 - 12 hours until thick. Tip: place the jar on a seedling heat mat if your kitchen is cool.
When it has thickened, store it in the refrigerator, where it will keep for a week or two.
Crème fraîche is great for cooking because it won’t curdle the way cream sometimes does when you heat it or add an acid like lemon juice or vinegar.