What ingredient is essential for a dressing to be classified as a true Caesar dressing?

For a dressing to be classified as a true Caesar dressing, anchovies are essential. They provide a unique umami flavor and depth that characterizes the traditional recipe. While other ingredients like Parmesan cheese and olive oil contribute to the overall taste and texture, anchovies are crucial for achieving the distinct flavor profile associated with Caesar dressing. They are typically used as a paste or finely chopped, allowing their essence to blend seamlessly with other components such as garlic, lemon juice, and Worcestershire sauce. This fundamental inclusion is what sets a genuine Caesar dressing apart from other salad dressings, establishing its identity and authenticity in culinary practices.