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The use of upcycled defatted sunflower seed flour as a functional ingredient in biscuits

Grasso, S., Omoarukhe, E., Wen, X., Papoutsis, K. and Methven, L. (2019) The use of upcycled defatted sunflower seed flour as a functional ingredient in biscuits. Foods, 8 (8). 305. ISSN 2304-8158

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To link to this item DOI: 10.3390/foods8080305


Defatted sunflower seed flour (DSSF) is an upcycled by-product of sunflower oil extraction, rich in protein, fibre and antioxidants. This study assessed the instrumental and sensory quality of biscuits enriched with DSSF at 18% and 36% w/w as a replacement for wheat flour. Measurements included colour, texture, total phenolic content (TPC) and antioxidant capacity. Sensory analysis was carried out with Quantitative Descriptive Analysis (QDA). The inclusion of DSSF significantly increased the protein content of the biscuits, as well as the TPC and antioxidant capacity of the biscuits. The resulting products were significantly darker, less red and less yellow with increasing DSSF levels, while hardness (measured instrumentally) increased. Sensory results agreed with colour measurements, concluding that DSSF biscuits were more “Brown” than the control, and with texture measurements where biscuits with 36% DSSF had a significantly firmer bite. In addition, DSSF biscuits at 36% inclusion had higher QDA scores for “Off-note” and the lowest scores for “Crumbly” and “Crumb aeration”. DSSF biscuits at 18% inclusion were similar to the control in most parameters and should be considered for further developments. These results show the potential of the upcycled DSSF by-product as a novel, sustainable and healthy food ingredient.

Item Type:Article
Divisions:Life Sciences > School of Agriculture, Policy and Development
Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Research Group
ID Code:85399
Uncontrolled Keywords:biscuits, upcycled food by-products, defatted sunflower seed flour, sensory QDA, TPA, colour, antioxidant capacity, protein enrichment, functional foods, valorisation


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