Big Mac Sauce is widely believed to be a variation of Thousand Island dressing. Both Big Mac sauce and Thousand Island dressing share some common ingredients, such as mayonnaise, sweet pickle relish, and mustard. However, Big Mac sauce is rumored to contain ingredients like garlic powder and paprika in addition to the basic components. While Big Mac sauce may share similarities with Thousand Island dressing, it is a unique recipe with its own specific combination of ingredients, giving it a distinctive taste that sets it apart.