Brunost the Norwegian dairy co-operative Tine, who market a total of 13 varieties, as well as three types of prim and three types of pultost. The second-largest is Norwegian dairy company Synnøve Finden, which market two varieties of brunost, as well as two varieties of prim. There are also a number of smaller, artisanal producers, mainly in Norway and in the US. Mysost are a family of cheese-related foods made with whey and milk and/or cream. Because the main ingredient, whey, is a byproduct of the cheese making process, brunost is not technically cheese, and it does not taste like cheese.
Brunost not adding milk or cream. Also, in Norway, pultost is traditionally made from byproducts of the brunost-making process, and has a very distinctive flavour. Brunost is mostly used as a topping for sandwiches, crispbread, and biscuits. It is very common in the traditional Norwegian matpakke (literally "food pack"), which is a common Norwegian lunch—sandwiches are packed in a lunch box in the morning, and carried to work for consumption in the 30 minute lunch break commonly afforded to Norwegian workers. One advantage of brunost for this purpose is that although its texture changes if not refrigerated, its taste does not.