Mousse cakes won't freeze when frozen. Mousse cake is a kind of cake with mousse powder as the main material. The appearance, color, structure and taste are varied, which is more natural and pure. Cream and coagulant are usually added to thicken it and freeze it.

Freezing, also called "refrigeration", is a method to artificially create low temperature by applying thermodynamic principles. Refrigerators and air conditioners are based on the principle of refrigeration. From a chemical point of view, a gas with a high critical point is generally liquefied under pressure, and then vaporized to absorb heat, and this process is repeated. When liquefied, it releases heat in other places, and when vaporized, it absorbs heat within the required range.