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How to Strain Whey from Cultured Dairy
Whey is often called for as a culture starter in foods like lacto-fermented vegetables, beverages, and grains and flours. It can be obtained from yogurt, kefir, cultured buttermilk, clabbered milk, and some cheeses.
Whey is full of the beneficial bacteria and enzymes found in these cultured dairy products. By using whey, the ferment is inoculated with the specific cultures in the whey.
Straining whey is easy. The main objective is to remove any dairy solids from the liquid whey so that it isn’t as perishable.
Place the strainer so that it is sitting atop the rim of the bowl, leaving a few inches of space below the strainer. Line the strainer with the cloth or coffee filter. Place the cultured dairy inside the lined strainer, being sure to keep the cultured dairy within the cloth or filter.
After a few minutes, the whey should begin slowly dripping through the lined strainer and into the bowl. The whey should be a translucent pale yellow with no white dairy streaks to it.
If you find that the first straining leaves some of the dairy solids in the whey, simply use a clean towel or coffee filter and pour the whey through the new filter, for a second straining.
Note that cloth must be very tightly woven in order to keep the dairy solids from dripping through. Coffee filters and tightly woven tea towels generally work the best.
Straining the whey for a few hours results in a soft, easily spreadable cheese of Greek-style yogurt texture. Straining overnight results in a denser, cream cheese-like texture and yields more whey in the end.
Store whey in a clean jar in the refrigerator, where it should last for months. The cheese can be stored in a separate container for a week or so and used as a cream cheese replacement or as a very thick spoonable snack.
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