Answer: Emulsion is a mixture of two or more unblendable liquids, or when fat molecules bond to water molecules. Common emulsions include mayonnaise, Hollandaise sauce and viniagrettes. Egg yolks contain chemicals known as emulsifiers, which is why eggs are commonly used for emulsions.
Next Question: When was The Pleasures of Vegetarian cooking published?
Previous Question: What is Deglaze / Deglazing?