What determines the creaming ability of fat?

Question

about the experiment in the plasticity of fat.

Answer 1

Well, i dont know what you mean about the plasticity of fat, but butter is the traditional fat for creaming, but vegetable shortening serves as a more effective leavener for a number of reasons. The low melting point of butter means it aerates best at temperatures cooler than most kitchens (18°C/65°F), while shortening works best at higher temperatures. Because of the coarser crystalline structure of its fat, butter allows larger air bubbles to form than shortening; large bubbles can rise in and escape from thin batters. Also, most shortening is made with preformed nitrogen bubbles and bubble-stabilizing emulsifiers, both of which enhance its leavening ability.

Hope this helps.