RAISING AGENT / LEAVENING AGENT Leavening or raising means to increase the surface area of any dough or batter by creating gas bubbles inside the dough or batter. This also makes a product light in weight. The expansion of gas bubbles during baking increase the volume of the product and gives a desirable porous structure. Raising agents that are used in kitchen can classified into following categories: Biological (yeast) Chemical (baking powder, baking soda, baking ammonia) Mechanical (beating, whisking, creaming, sieving) Lamination Combination of all BIOLOGICAL RAISING AGENT 1) Yeast can of two types : Fresh or compressed yeast Dry yeast The scientific name of yeast is Saccharomyces Cerevisiac. Yeast is unicellular microscopic fungi. The structure of yeast consist : Cell wall Protoplasm Vacoale 2) Food : Simple sugar like dextrose or fructose. 3) Suitable climate : 80 to 85 degree F, at least 70% humidity can give the best resul...