The primary ingredient in Caesar salad dressing is typically anchovies. They are blended into a mixture that may also include garlic, egg yolks, lemon juice, Dijon mustard, olive oil, and Parmesan cheese. The anchovies are key to achieving the signature umami flavor that defines Caesar dressing, providing depth and richness to the overall taste. Despite their strong flavor, the anchovies are often finely minced, which allows them to integrate seamlessly into the dressing, enhancing rather than overpowering the other ingredients. Caesar salad has become a classic, largely due to this distinctive dressing.