Final answer:
The process of beating fat and sugar together to incorporate small bubbles of air is called creaming, an essential technique in baking to achieve a light and fluffy texture.
Step-by-step explanation:
Beating fat and sugar together to incorporate small bubbles of air is known as creaming. This process is a fundamental technique in baking, specifically in the making of cakes and cookies.
During creaming, air is trapped in the mixture, which then expands during the baking process, resulting in a light and fluffy texture. The air bubbles are important because they will expand when the product is heated, contributing to the leavening in the baking process.