Ranch Dressing (Copycat Outback Steakhouse) Recipe. If you're a fan of Outback Steakhouse's Ranch Dressing, you'll be thrilled to know that recreating it at home is simple. This recipe captures the classic taste with everyday ingredients like mayonnaise, buttermilk, and a blend of seasonings. It's an ideal choice for salads or as a dip. Whether you're serving it at a casual get-together or just spicing up a weekday meal, this ranch dressing is a versatile and easy-to-make option.