Quality Characteristics of Fiber – Rich Biscuits From Blends of Sweet Potato and Tigernut Flour (P04-073-19)

Abstract

Abstract Objectives This study sought to prepare biscuit from composite flours of sweet potato and tiger nut flour blends as well as to evaluate nutritional composition and consumer acceptability of formulated biscuits. Methods Sweet potato was purchased at Federal University of Technology Research farm, Akure, Nigeria. Tiger nut (brown variety) and other principal ingredients (sugar, fat and salt) were purchased from Oba market in Akure, Nigeria. All chemicals used were of analytical grade. The sweet potato tuber was processed into flour according to the method described by (Noorakmar, et al., 2012) with slight modification. Tiger nut was processed into flour according to the method described by Awolu, et al (2017). Percentage of TNF in SPF was 10% (SWT10), 20% (SWT20), and 30% (SWT30) while SPF 100% (SWT0) served as control. The procedure for making the biscuits was produced according to the method of AACC, (2000) Moisture, protein, fat, crude fiber, and ash contents were determined according to the method described by A.O.A.C. (2005). Carbohydrate was calculated by difference. Mineral analysis were determined as described by A.O.A.C. (2005), The dietary fiber content of PM-OP biscuits was determined using the described method of the A.O.A.C. (2005). Fatty acid composition was analyzed using the gas liquid chromatography (GLC) as described by Stahle, E. (1967). Sensory evaluation of the formulated biscuit was carried out using 9-point hedonic scale as described by Kaur.et al., (2015) Results Protein content range from 1.74 to 7.53%, fat content range from 2.05 to 12.77%, crude fibre range from 0.63 to 3.81%, ash content range from 5.89–6.68%, moisture content range from 3.84 to 9.84%. Potassium was the most abundant mineral content present in the biscuit and its value ranges from 11.50 to 41.20 mg/100 g. DF increased significantly (P < 0.05) with an increase in Tiger nut. The total dietary fibre value range from 7.15 to 8.69%, the ratio of soluble to insoluble dietary fibre was 3:1. The predominant fatty acid in the biscuit is linoleic acid followed by oleic acid. The overall acceptability revealed that SWT20 was the most acceptable of the biscuits. Conclusions Consumption of fibre-rich biscuit from the blends of sweet potato and tigernut flour could serve as a nutritious snacks capable to reduced the menace of degenerated diseases in a riotous economy Funding Sources None. Supporting Tables, Images and/or Graphs