Serve this sauce hot over your favorite roast.
1-1/2 T. butter or margarine
1/3 cup light brown sugar
1/4 cup granulated sugar
1/4 cup prepared mustard
1/4 t. salt
1/8 t. pepper
3/4 cup cider vinegar
Step 1. Melt butter in a small saucepan. Remove from heat and set aside to cool.
Step 2. In a small bowl, with an electric mixer, beat egg, sugars, mustard, salt and pepper until well combined.
Step 3. Beat in vinegar. Stir mixture into cooled butter. Mix well.
Step 4. Over medium heat, bring to a boil, stirring. Reduce heat and simmer 3 minutes. Serve hot.