Horseradish powder is made by grinding dried horseradish root, and it's a spicy, pungent ingredient that can really pack a punch! It’s often used as a condiment or spice, adding heat and sharpness to dishes like sauces, dressings, and even meats. When fresh, horseradish has a strong, almost sinus-clearing kick, but the powdered form can also give that spicy kick to foods.