What is a common ingredient in many salads that also adds a creamy texture?

Mayonnaise is a common ingredient in many salads, particularly those that require a creamy texture. It serves as an emulsifying agent, which means it helps to blend together oil and vinegar or other liquids, creating a smooth and cohesive dressing. This creamy characteristic can elevate the overall mouthfeel and taste of salads, making them more appealing.

While vinaigrette is often used in salads, it typically has a lighter, more fluid consistency due to the absence of creamy components. Olive oil provides a rich and smooth flavor but does not contribute creaminess on its own. Ranch dressing does have a creamy texture and is frequently used in salads, but it is essentially a flavored variant that incorporates mayonnaise, buttermilk, and various seasonings. Thus, mayonnaise stands out as a foundational ingredient that directly imparts that desired creaminess to many salad recipes.