Roux in Bosnian, Croatian, Serbian, and Macedonian, () in Bulgarian, in Hungarian and in German. Japanese curry, or , is made from a roux made by frying yellow curry powder, butter or oil, and flour together. The French term has become a loanword in Japanese, , or more specifically . Roux ("meyane") has been used in Ottoman and Turkish cuisine since at least the 15th century. The fat is heated in a pot or pan, melting it if necessary. Then the flour is added. The mixture is heated and stirred until the flour is incorporated, and then cooked until at least
Butter Then the grains are "worked": pressed and kneaded together. When prepared manually, this is done using wooden boards called scotch hands. This consolidates the butter into a solid mass and breaks up embedded pockets of buttermilk or water into tiny droplets. Commercial butter is about 80% butterfat and 15% water; traditionally made butter may have as little as 65% fat and 30% water. Butterfat is a mixture of triglyceride, a triester derived from glycerol and three of any of several fatty acid groups. Butter becomes rancid when these chains break down into smaller components, like butyric acid and diacetyl. The