The effects of the moisture content of the raw material, extrusion temperature and screw speed on flavor
retention, sensory acceptability and structure of corn grits extrudates flavored with isovaleraldehyde,
ethyl butyrate and butyric acid were investigated. Higher temperature resulted in more expanded
extrudates with lower density and cutting force, while higher moisture content increased ethyl butyrate
retention. The most acceptable extrudates were those obtained with low moisture content, under con-
ditions of high extrusion temperature and high screw speed, or low screw speed and low extrusion
temperature, whereas the aroma intensity closest to the ideal was observed under conditions of low
extrusion temperature and low moisture content of the raw material.