Horseradish Root for a Mustard That Bites Back What is Horseradish? Horseradish is a root vegetable from the mustard family, known for its strong, pungent flavor. It is commonly used as a condiment, often prepared as horseradish sauce, which combi... Condiment Hempzels Horseradish Mustard Mustard That Bites Back NataliesChoice Pretzels