Horseradish Sauce - cooking recipe

Ingredients

3 tablespoons prepared horseradish (do not use horseradish spread)
1 tablespoon cider vinegar
1 teaspoon dried mustard powder
3 tablespoons mayonnaise
1/2 cup sour cream
cayenne pepper (optional or to taste)

Preparation

In a bowl whisk all ingredients together until blended and smooth.
Cover and chill for a minumum of 2 or more hours before using.