belsküls
Belsküls is a traditional Scandinavian fermented dairy product, similar to yogurt or skyr. Its name derives from Old Norse and refers to the sour or tangy taste characteristic of the product. Historically, belsküls was made by allowing milk, typically from cows or goats, to ferment naturally at room temperature. The process relied on the lactic acid bacteria naturally present in the milk to curdle it and develop its signature flavor.
The consistency of belsküls can vary, often being thicker than regular milk but less firm than cheese.