Double-mustard Sauce

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Sexton Estate in Addison, Texas in 1986.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 cup mayonnaise
 * 1 tablespoon stone ground mustard
 * 1 teaspoon dry mustard
 * 1 teaspoon drained capers
 * ¼ teaspoon freshly ground black pepper
 * 1 scallion minced

Directions

 * 1) Spoon mayonnaise into a small bowl.
 * 2) Mix in remaining ingredients then cover and refrigerate until ready to use.