Abstract: Heat treated cereal grains can be obtained from cereal grains by a process, wherein the cereal grains are subjected to a heat treatment with a gas in an annular fluidized bed, which gas has different velocity components; the grains obtained result after milling in a flour with: 25-80% damaged starch a water binding capacity of 1.5-6 g/g an initial gelatinization temperature of more than 50° C. particle size of 1-200 &mgr;m.

Abstract: Air-classification of flours with a particle size of 5-160 .mu.m is best performed on flours that are remilled at least once to give a remilled flour with an x-50 of less than 40 .mu.m.The remilling, preferably being carried out by using a jet air mill, a Retsch mill or an extruder. In this way a higher yield of a fraction, enriched in protein (up to 40% protein) and a higher yield of a starch fraction with a low protein content (even less than 3 wt %) can be obtained. Wetting of the remilled flour, prior to remilling and drying of the remilled flour, prior to air classification lead to improved results.