Traditional Caesar dressing is made out of emulsified oil and egg yolks, similar to mayonnaise, with seasonings like Worcestershire sauce, black pepper, vinegar, and anchovies. Any creamy, oily base will work well for the dressing, and the obvious choice is mayonnaise, so this vegan version calls for vegan mayo as the dressing base. There are other versions of Caesar dressing that call for tahini or blended cashews instead of mayo.