Abstract:
Ice cream is a popular frozen sweetened dessert often made with various artificial
flavors. Nowadays, people prefer natural flavors rather than artificial flavors in food
products especially considering the various health benefits associated with natural
ingredients. Ginger, which has a high pungency level, can be used as a natural
flavor ingredient in food product formulations. In addition, ginger is a medicinal
herb which has several reported health benefits such as prevention of cough and
cold. Moreover, the sensory properties of ice cream can be improved using ginger
and black tea flavor. However, high pungency levels may have negative effects on
the flavor profile of ginger ice cream. Therefore, this study was carried out to
evaluate the suitability of ginger juice and black tea as flavoring agents in
production of ice cream by evaluating the effect of them on the physicochemical,
microbiological, sensory properties and the shelf-life of the final product. Ginger
juice was used at levels of 4, 6, 8, 10 % (v/v of ice cream mix) and black tea flavor
(LA 09303) was used at levels of 0.2, 0.3, 0.4, 0.5 % (v/v of ice cream mix) to
prepare the ice cream. The basic ice cream mix was formulated to have 9% fat,
8.5% MSNF and 14.6% sugar. The ice cream containing 6% ginger juice and 0.3%
was identified as the most suitable sample for making the ginger ice cream
considering its significantly high (P<0.05) sensory properties. It showed the best
sensory properties compared to other experimental samples after six weeks of
storage. Addition of ginger juice resulted in decreasing of fat, protein and' total
solids in all the experimental samples. There were no significant (P>0.05) changes
in MSNF, titratable acidity and pH in all the experimental samples. Addition of
ginger juice appeared to significantly increase (P<0.05) the viscosity and melting
resistance of the various ice cream formulations. Aerobic organisms (Aerobic Plate
Count) and E. coli were not detected in all the ice cream products during storage,
thus, showing hygienic production procedures. It can be concluded that herbal ice
cream products can successfully be manufactured by adding 6% ginger juice and
0.3% black tea flavor.
