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. 2023 Jan 30;103(2):548-559.
doi: 10.1002/jsfa.12165. Epub 2022 Aug 26.

Andean purple maize to produce extruded breakfast cereals: impact on techno-functional properties and sensory acceptance

Rebeca Salvador-Reyes  1   2 , Ulliana Marques Sampaio  1 , Thaísa de Menezes Alves Moro  1 , Aline Duarte Correa de Brito  1 , Jorge Behrens  1 , Pedro H Campelo  3 , Maria Teresa Pedrosa Silva Clerici  1
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Andean purple maize to produce extruded breakfast cereals: impact on techno-functional properties and sensory acceptance

Rebeca Salvador-Reyes et al. J Sci Food Agric. .

Abstract

Background: Andean purple maize (APM) is an ancient crop widely used as a natural coloring in traditional Peruvian cuisine. However, it has been little explored within the food industry. The present study assessed how APM impacts on techno-functional properties and sensory acceptance of breakfast cereals. Extruded samples formulated with 100, 75, 50, and 25% APM, and complemented with yellow corn grits (YCG), were analyzed for their techno-functional and sensory properties.

Results: Increases in bulk density, as well as reduction in the expantion and porosity were observated for extrudates containing ≥ 50% APM, accompanied by an increase in purple color intensity. Increase in milk absorption index, reduction in milk solubility index and decrease in cereal hardness with increase in APM were also observed. Despite this, APM extented the cereal bowl-life. High sensory scores of overall liking (6) and color (7) were obtained for extruded formulations containing ≥ 50% APM and low values for extrudates with 25% APM. Aroma, flavor, and texture scores did not present significant differences.

Conclusion: APM is an ingredient with the potential to be used to produce breakfast cereals since it improves their techno-functional characteristics and sensory acceptance, at the same time, it leads to the production of healthy, nutritious, and sustainable food. © 2022 Society of Chemical Industry.

Keywords: clean label; floury endosperm; pigmented cereal; ready-to-eat; thermoplastic extrusion.

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