An apparatus for preparing a finely divided meal or flour product includes at least one pair of corrugated rolls, a first drive mechanism for rotating a first roll in a first direction at a first speed, and a second drive mechanism for counter-rotating a second roll in a second direction at a second slower speed. Each roll is provided with Twin City Chunk corrugations set in an outer surface of the rolls in a spiral pattern of about 1.5 inches per lineal foot. The difference in rotational speeds of the first and second rolls provides a reduction ratio of about 2:5.1. Finely divided meal or flour products and methods for producing the products using the disclosed apparatus are also provided.