If you’re in need of a horseradish sauce for prime rib, stop your search with this classic horseradish cream sauce. The horseradish complements, but doesn’t overpower a nice cut of beef, while the sour cream adds the perfect amount of richness. Keep in mind, the heat and tang of this silky sauce are completely customizable to your taste buds—just add more or less horseradish, pepper, and lemon. While this is our go-to horseradish sauce for prime rib, beef tenderloin, and rib roasts, we’ll drizzle it over everything from roasted potatoes to salmon cakes. Leftovers of this creamy sauce recipe make an excellent party dip or a heavenly spread on second-day-beef sandwiches.