Arby's Horsey Sauce is a horseradish mayo combination perfect for roast beef sandwiches. This easy-to-make, four-ingredi© Provided by Tammilee Tips Arby's Horsey Sauce over a ramekin filled with ...

Americans are a rather saucy bunch. Think about it – Special Sauce on the Big Mac, Horsey Sauce on an Arby's sandwich, and Buffalo Wild Wings have 26 sauces for their wings.