Abstract: Grain, (or a milling intermediate, e.g. semolina) is heated at a temperature of 100.degree. to 140.degree.C (or 100.degree.-200.degree.C for semolina) for a period inversely related to temperature and not less than 1 hour at 100.degree.C, so as to improve the quality of cake flour produced by milling (or further milling). The time of heating t (in minutes) is preferably related to the temperature T (in .degree.C) by the equation t = a' - b'T + c'T.sup.2 where for wheat a'= 2188, b'= 31.535 and c' = 0.11438 and for semolina a' = 408, b' = 4.252 and c' - 0.1121. The need for chlorination of the flour produced is thus avoided.