Noun
prostokvasha
prostokvasha (uncountable)
A thick soured milk product, similar to unsweetened yogurt but less sour, or kefir but thicker. In Russia or other former USSR republics, commercial and home-made prostokvasha comes in different varieties: "varenets" (варенец), "ryazhenka" (ряженка), katyk/qatıq (катык), etc.