Quality Attributes of Cookies Produced From Composite Flours of Wheat, Germinated Finger Millet Flour and African Yam Bean
Quality Attributes of Cookies Produced From Composite Flours of Wheat, Germinated Finger Millet Flour and African Yam Bean
Quality Attributes of Cookies Produced From Composite Flours of Wheat, Germinated Finger Millet Flour and African Yam Bean
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Science
Abstract
Cookies are ready to eat convenient food for all ages and the consumption is on the increase in
Nigeria due to urbanization which has led to increase in wheat importation. In order to reduce the
effects of wheat importation on the economy, this study looked into the use of locally grown crops
for production of cookies. Cookie samples were produced from blends of wheat flour, germinated
finger millet and African yam bean. Different proportions of flour blends were obtained using
design experts. The flour mixes were evaluated for the proximate, minerals composition,
antinutrients and the functional properties while the sensory properties of the cookies were
determined. The proximate composition of the composite flour varied from 12.20-12.54; 8.89-
10.62; 1.31-1.65; 1.13-1.39; 1.82-1.48 and 74.33-72.66% for moisture, protein, fat, crude fibre,
ash and carbohydrate content of the flour, respectively. The mineral content of the flour ranged
from 9.064-9.10, 0.29- 0.32, 0.42-0.45, 0.24-0.28% for calcium, phosphorus, potassium and
sodium, respectively. The anti-nutritional properties of the flour ranged from 0.0074 to 0.0098%,
0.1700 to 0.1990%, 0.0905 to 0.1080% and 1.2500 to 1.4900%, for tannin, phytate, oxalate and
trysin inhibitor, respectively. The functional properties of the composite flour ranged from 0.66-
0.67 g/ml; 25.87- 27.48 g/ml; 6.11-8.12 g/ml; 0.75- 0.83 g/ml; 106.65 to 124; 91.70-99.75 g/100g;
for bulk density, water absorption capacity, oil water capacity, foaming capacity and foaming
solubility, respectively. The sensory attributes studied were colour, taste, texture and crispness.
This study has shown that there was a notable improvement on the nutritional and functional
properties of the flour while there was reduction in the ant nutrients.
Keywords: African Yam Bean; Finger Millet; Cookies; Wheat Flour; Snack; Composite Flour.
Cite This Article: Abioye V.F, Olatunde S.J, and Elias G. (2018). “QUALITY ATTRIBUTES OF
COOKIES PRODUCED FROM COMPOSITE FLOURS OF WHEAT, GERMINATED FINGER
MILLET FLOUR AND AFRICAN YAM BEAN.” International Journal of Research -
Granthaalayah, 6(11), 172-183. https://doi.org/10.5281/zenodo.1845427.
Cookie is a conventional wheat flour-based food product produced from unpalatable dough with
the application of heat and transformed into an appetizing product (Kulkarni, 1997; Obasi et al.,
2012; Ikuomola et al., 2017). It forms part of the bakery products that are consumed extensively
all over the world by all ages (Sengev et al., 2015). Cookies are ready to eat, convenient and
inexpensive snack food products containing digestive and dietary principles of vital importance
(Adeyeye and Akingbala, 2015). The principal ingredients are wheat flour, fat, sugar and water
and optional ingredients include milk, salt, flavouring agent, aerating agent, food additives and
others. Soft wheat flour has been the major ingredient used in the production of cookies but
imported by countries with unfavorable climatic conditions such as Nigeria. The increase in the
importation could lead to economic drain, high prices of these bakery products and a threat to food
security. This necessitates a need for strategic development in the use of inexpensive local
resources in the production of cookies.
Finger millet (Eleusine coracana L) is a small cereal grain grown in the semi-arid subtropical and
tropical regions of Africa and Asia where it is one of the staples (Obilana and Manyasa, 2002). It
is one of the most nutritious and healthy cereals with high protein and mineral contents
(Chandrasekara et al., 2016; Wafula et al., 2018). Finger millet is rich in protein, mineral content,
and dietary fiber, it is valuable because it contains the amino acid, methionine which is lacking in
diet of hundreds of millions of the poor who lives on starchy stapes such as cassava, plantain,
polished rice and maize meal but underutilized (Amadon et al., 2013). It is also rich in magnesium,
phosphorous, potassium, iron and has been reported to have 5-30 times the calcium content found
in other cereals (Devi et al., 2014; Kumar et al., 2016; Vinoth and Ravindhran, 2017).
African Yam Bean (Sphenostylis stenocarpa) (AYB) is an under-utilized food legume usually
cultivated for its edible seeds and tubers in most Sub-Saharan African Countries (Azeke et al.,
2005; Moyib et al., 2008). It is a good source of protein, carbohydrate, minerals and vitamins.
AYB is rich in dietary fibre and other phytochemicals that may have positive effects on health
(Ndidi et al., 2014; Ojinnaka et al., 2017; Onuoha et al., 2017). The primary challenge to wide
consumption of African yam bean (AYB) includes hardness of the seed which results into longtime
cooking and the antinutrient contents of the seed (Aremu and Ibirinde, 2012; Abioye et al., 2015).
It is thus very important to find alternative utilization methods apart from cooking to prevent
further neglect and promote cultivation.
Increase in urbanization coupled with growing number of working mothers, have profoundly
contributed to the popularity and increased consumption of snack foods in Nigeria. The escalating
cost of wheat importation and difficulty in cultivating wheat in the tropics has focused attention
on the need to explore the use of alternative local flours as supplements or substitutes for wheat
flour in the baking industry. There is also an increasing interest in the consumption of functional
foods where the consumers are not only interested in the nutritional benefits of foods but also in
the health benefits (Azzura and Paola, 2009). Finger millet is an important cereal because of the
nutritive value and excellent storage properties but underutilized due to anti nutritional contents.
These anti nutrients have been reported to be reduced to minimal value by processing such as
soaking, germination, malting and fermentation (Soetan and Oyewole, 2009; Sokrab et al., 2012).
African Yam Bean is also an underutilized grain legume in Nigeria though contain quality protein
content.
2.1. Material
Finger Millet (Eleusine coracana) grains were obtained from Ahmadu Bello University, Zaria,
Kaduna State, Nigeria. African Yam bean (Sphenostylis stenocarpa) seeds, were obtained from
Genetic Resources Centre, Institute of Agriculture and Research Training, Ibadan, Nigeria
(IAR&T) while other ingredients; shortening, sugar, salt, eggs, milk powder, baking powder
(Sodium bicarbonate) were obtained from a local market in Ogbomoso, Oyo State, Nigeria. All
chemicals used for this research were of analytical grade.
2.2. Methods
Preparation of Cookies
The cookies were baked using the method of Ceserani et al. (2008). About 50 g of Fat and 40 g of
sugar were creamed to a smooth consistency; eggs and milk were also added and mixed. The dry
ingredients; flour (100 g), baking powder (1 g) and salt (0.5 g) were mixed together and added to
the cream followed by the flavour (vanilla flavor) and nutmeg to form a dough. The dough was
kneaded into uniform thickness, cut into shapes, placed in greased pans, egg washed .and baked at
150 °C for 20 min. The cookies were packaged in cellophane bags prior to analysis.
2.3. Analyses
Proximate Analysis
The flour samples were analyzed for moisture, ash, crude fibre, protein (N*6.25), crude fat and the
carbohydrate determined by difference according to the method described by AOAC (2005).
Mineral Analyses
Selected minerals, including calcium, phosphorus, potassium, and sodium were extracted from dry
ashed samples and determined by atomic absorption spectrophotometer (AOAC, 2005).
Antinutritional Factors
The tannin content of the flour mixes was determined as described by Makkar et al. (1993) using
Folin Denis Reagents. Phytate content was determined using spectrophotometric method as
described by Pearson (1976). Trypsin inhibitor was determined according to the methods described
by Arntfield et al. (1985) while the oxalate content of the samples was determined using titration
method.
Statistical Analysis
The results of the experiment was subjected to analysis of variance (ANOVA) and the mean was
separated with the use of Duncan’s multiple range test to detect significant difference (p<0.05)
among the sample.
The fat content of the flour ranged from 1.31-1.65% with the sample with 100% wheat flour having
the lowest value (1.31%) and the sample with 50% wheat flour, 30% germinated and 20% having
the highest (1.65%). There was little increase in the fat value as finger millet and African yam bean
flour is been added, this might be attributed to the high fat content in African yam bean flour. Fat
improves flavour and increase the mouth feel of foods and It is a significant factor in food
formulation especially in the cookies (Eke and Akobundu, 1993; Iwe and Egwuekwe, 2010). The
crude fibre content ranged between 1.13-3.39% and higher values were recorded with addition of
germinated finger millet flour and African yam bean flour. This may be attributed to the fact that
Finger millet is a good source of fibre and also due to germination process which increased the
fibre content of the flour.
The foaming capacity and foaming stability of the flour samples ranged from 25.87 to 27.48 and
6.11 to 8.12, respectively with the sample with 100% having the lowest value. Higher foaming
capacity and foaming stability were observed as finger millet and African yam bean flour were
substituted into the composite flour. Foamability is related to the rate of decrease in the surface
tension of the air-water interface caused by absorption of protein molecules (Eke and Akobundu,
1993; Mepha et al., 2007). Foaming capacity and foaming stability contribute to dough formation
and stability (Olapade and Oluwole, 2013). High foaming capacity and foaming stability is a
criteria for good quality product (Achinewhu et al., 1998).
Mean with the same superscript along the same column are not significantly different (p>0.05)
Sample A= 100% WF
Sample B= 90% WF, 10% GFM, 0% AYB
Sample C= 80% WF, 20% GFM, 0% AYB
Sample D= 70% WF, 30% GFM, 0% AYB
Sample E= 70% WF, 20% GFM, 10% AYB
Sample F= 60% WF, 30% GFM, 10% AYB
Sample G= 70% WF, 10% GFM, 20% AYB
Sample H=50% WF, 30% GFM, 20 % AYB
This study has shown that there was a notable increment in the nutritional value with increase in
the level of substitution of germinated finger millet and roasted African yam bean. The germination
and the roasting as processing techniques improved the nutritional value of the flour mixes and
reduced the antinutrients which have been a limiting factor in the use of these crops. It could also
be inferred from this study that acceptable and good quality cookies could be produced from
composite flour of wheat, germinated finger millet flour and African yam bean.
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*Corresponding author.
E-mail address: vfabioye@ lautech.edu.ng