Which dressing is made in-house at the restaurant?

The choice of ranch dressing as the in-house made option is correct because many restaurants, including Denny's, often prepare their ranch dressing from scratch to ensure freshness and maintain control over the flavor profile. In-house preparation allows for customization, such as adjusting the ingredients to enhance taste or accommodate dietary preferences. This process can also reflect the restaurant's commitment to quality and the use of fresh ingredients.

While other dressings like blue cheese, Thousand Island, or Caesar may be commonly available in pre-packaged forms, they are often not made on-site. This distinction highlights the effort to provide unique, house-made flavors that can differentiate the restaurant's offerings from others. The choice of ranch emphasizes a popular dressing that is versatile and widely loved, making it a practical option for in-house preparation at Denny's.