Prime Rib Sauce for Dipping Posted on 11/12/2017 by cook Leave a comment Ingredients 1 c. sour cream1/2 c. salad dressing mayonaise1 T. horseradish1 c. sour cream1/2 c. salad dressing mayonaise1 T. horseradish Directions Stir ingredients and dip prime rib in the sauce. Tangy good!