In Turkey, kashk is a dried yoghurt product also known as keş peyniri, kurut, taş yoğurt, kuru yoğurt, or katık keşi. Its contents and production vary by region.In western and northern Turkey, especially in Bolu, the product is categorized as a cheese owing to its shape and white color.ashk is also mentioned in the 10th-century Persian book of poetry Shahnameh. Khoshk (Persian: خشک meaning dry) which indicates that the kashk or kishk is prepared through a drying [خشکیدن] process. Qurut or kurut means dried in Turkic languages.