A process and apparatus for the continuous production of whole nixtamalized corn flour, includes a whole clean corn precooking with a lime solution to effect a partial hydrolysis of pericarp and bran with reduced soluble corn loss in Nejayote wastewater. Moisture content is then stabilized, followed by milling and drying preconditioned corn for further endosperm gelatinization in the whole ground kernel, venting and separating the dry-milled fractions. Adiabatic cooling under a partial vacuum of the vented dry-grind fractions and classifying with an upwardly airstream to strip the fine-grind from the coarse grind while the latter is separated downwardly as a moving bed. Venting and separating the classified fine grind fraction; sifting and recovering the cooled and classified fine grind so segregated from the coarse grind, remilling and further screening the coarse grind produces a whole nixtamalized corn flour for tortilla and whole grain corn-based foods.