The corn starch is recommanded for all pastries, including sponge cake, biscuits and Pain de Gênes. Corn starch make your pastry fluffier, ease the proving and baking. It is also used in cooking to thicken sauce, cream, soup, ...etc.
The "excellence tempura" is a special flour used to prepare the delicate japanese fritters which composed a tempura. Everything can be transformed except juicy vegetables or tomato, pork and beef that harden quickly.
The FunCakes Magic Roll-Out Powder, also known as Bäckerstärke in Germany is a very fine potato starch. This roll out powder is very suitable for rolling out fondant, marzipan and dough. But you can also use it to dust your silicone molds. The starch will prevent sticking.