Horseradish powder is a whitish powder with a hot, sharp taste.
It is made made from horseradish roots that are cleaned and dried, then ground into a powder that is used as a spice.
It is usually used in sauces and other items that aren’t cooked, as cooking can inactivate the heat.
It is used a lot commercially.
To make horseradish sauces at home, add some horseradish powder to mayonnaise, sour cream or crème fraiche.
Add a bit of horseradish powder to coleslaws, tomato juice-based drinks, meat loaves, etc, to give them a bit of kick.