Horseradish is a spicy powder with a taste similar to mustard. Use ground horseradish for a spicy touch in sauces. Horseradish is delicious with oriental dishes, but also used in European cuisine. Always use this ground horseradish at the end of cooking. Horseradish loses taste and spiciness when cooking. For a corrosive, thick horseradish sauce, use 1 part powder with 3 parts water. For a thinner sauce, add some lemon juice, vinegar, or yogurt.