Biscuits are the major products produced by the biscuit and crackers industries. Flour confectionery describes a large range of flour based goods other than bread manufactured from batter sponge or dough by mixing, kneading and may be created by fermentation, chemical or other means resulting in puff/flaky short or sweet product. Those that have their moisture content reduced to make them exceptionally brittle or crops are generally regarded as biscuits. (Okaka, 1997)
The word biscuit come from the Latin word Biscuit meaning twice cooked, baking at high temperature followed by drying at lower temperature (Okaka, 1997). The term biscuit and cookie are synonymous. The American Encyclopedia described biscuit as a form of bread baking soda as a raising agent rather than yeast.
Biscuit are a common feature of southern us cousine which can be served as a side dish with meal or as a breakfast item. Biscuit is also said to be essentially bakery confectionery dried down to low moisture content name derived from Latin word for twice cooked, made from soft flour, mostly rich in fat and sugar and consequently of high energy content of 420 to 510kcal per 100g they are cherished by people of all ages and used at different meals and occasions as part of breakfast, snacks etc. they are eaten with butter and jam or jelly or as a part of a dish called “Biscuit and gravy”. Biscuits are also eaten covered in pizza sauce and cheese. Many varieties exist, both sweet and savoulry often produced in industrial quantities by large food companies. Sweet biscuit are commonly eaten as snack and may contain chocolate fruit, jam or nuts (peanuts). Savoury biscuits are plainer and commonly eaten with cheese following a meal
The simplest form of biscuit is a mixture of flour and water but may contain fat sugar and other ingredients mixed together into a dough which is rested for a period, passed between rollers to make a sheet. The sheet is then stamped out baked, cooled and packaged. Biscuits are generally made from wheat flour but according to the topic of this project, “use of composite blends for biscuit making”. Some raw materials other than wheat have to be used in producing the flour for the biscuits. In order to get a superior product especially for crackers, the following factors are of importance – choice of flour for sponge and dough, selection of fermentation environment and the baking conditions. It is therefore necessary to search for raw materials that give flour of light quality.
Biscuits are classified based on their degree of enrichment and processing or by the method adopted in shaping them. Based on the enrichment criterion are hard dough, soft dough and batter biscuit respectively. (Okaka; 1997). Soft wheat is used in making flour for most biscuit and the softness is de to lower protein (gluten) content when compared with the hard wheat. Based on this fact, raw materials are chosen from other legumes such as Peanut and Roots such as cassava. Since they contain protein though in lesser quantity and quality.
Peanuts are one of the leading agricultural crops of the world and belong to the family leguminous. It is a source of edible oil and plant protein. The characteristic feature of legume seed protein is that they are markedly deficient in methionine and tryptophan. Infact, methioine is t he first limiting essential amino acid in almost all the legume grains. Peanuts contain about 26% to 35% protein with the peanut meal containing a large amount of nutritionally essential amino – acid. The seeds are nutritional and contain vitamin E, Niacin, folacin, calcium, phosphorus, magnesium, zinc, iron, riboflavin, thiamine, potassium etc (Ogbo; 2002). Peanut also contain a significant load of resveratrol, a strong antioxidant which inhibit lipid peroxidation of low – density lipoprotein (LOL), prevents the cytotoxicity of oxidized (LDL) and protects cells against lipid peroxidation. Hydrophilic aid lipophilic properties, it can as well provide more effective protection than other well known antioxidations such as vitamin C and E.
Peanut is used for different purposes, food (raw, roasted or b oiled, cooking oil), animal feed and industrial raw material. There are four varieties of peanut:- Virginia, Peruvian runner, Valencia and Spanish.
Cassava, one of the raw materials is an indigenous and stable food of millions of Nigerian people. The few misconceptions related to cassava especially with regard to its low nutritional value and its toxicity have been effectively challenged by National ad International Research Institutions. National Institutions like University of Agriculture Umedike in Umuahia who have succeeded in producing many Tropical Manioc Selection (TMS) varieties with an added advantage of low cyanide.
Despite the obvious advantages of cassava like being easily propagated by stem cutting. Relatively high yielder and excellent source of calories, cassava remained for some time a neglected crop in agricultural research and development activities to an extent not commensurate with its importance as food. However, some developments within the past 15 years have enhanced interest in the crop and research priority has been given to research on its improvement, increased production and utilization.
First, the International Society for Tropical Root and Tubers Crops was founded in 1967 to encourage research, increased production and utilization and exchange of information on tropical root and tuber crops including cassava yams, sweet potatoes and avoids. Second, among the International Institutions (International Institute for Tropical Agriculture – IITA – in Nigeria, and he International Centre for Tropical Agriculture – CIAT in Colombia) that have programmes giving high priority to research on the improvement, production systems, storage and utilization of cassava and other related training. Roots and Tubers Expansion Programme (RTEP was also put in place to develop and source for alternative uses of cassava as industrial raw material and create enabling market environment. High Quality unfermented flour”, including fortified cassava flours are now more accessible because of the improved processing and technological methods for processing cassava. These technologies can be used to produce particle / whole substitute for wheat flour from 540 100 percent in bakery and confectionery products such as biscuit, chin-chin etc. and some of these snacks have no noticeable change in texture, flavour, aroma nor colour.
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THE PRODUCTION AND USE OF COMPOSITE BLENDS FOR BISCUIT MAKING