What is
Quark is a type of fresh dairy product, common for the cuisines of German-speaking countries made by warming soured milk until the desired degree of coagulation (denaturation, curdling) of milk proteins is met, and then strained.
  
- Skyr is a cultured dairy product that is thick and creamy and tangy .
- Skyr is a fresh skim-milk cheese, strained to a whipped-custard consistency.