Define the uses of foams
The foams frequently used in cookery are whipped cream, ice cream, cake, bread, meringues, milk froth and gelatin. Food foams contain large amounts of entrapped gas.
They have an extensive surface area between the gaseous and liquid phase, a higher concentration of the solute at the surface than in the bubble liquid, and walls which are rigid and elastic and reflect light so that they have an opaque appearance.