Sponge cake...

soft Cake, Flour,baking powder, sugar,Egg . The only fat present is from the Egg yolk which is added separately to the white. It is often used as a base for other types of cakes and desserts.
A basic sponge cake is made by beating the egg yolks with caster sugar until they are light and creamy, then carefully sieving and folding the flour and Raising agentraising agent (which may be included in the flour) into the mix. Finally, the egg white are Whisk in a separate bowl until stiff, and carefully folded into the yolk mixture. The combined mixture is poured into the chosen cake tin and baked. As can be seen, this method takes great care to incorporate air in the beating, whisking and sieving stages. This makes a very light product, but is easy to lose the air by banging the mixture before it is cooked, or removing the cake before it has finished in the oven.
Before the mixture has cooled, after cooking, it is still bendy and flexible. This allows the creation of such puddings as the Swiss roll

tags: sponge, pastry