2 eggs
1/2 c. sugar (cut down to taste)
1/4 c. vinegar
1/4 c. water
1 tbsp. mustard (reg. not dry type)
1/2 stick butter
2 c. mayonnaise

Beat eggs until thick. Add sugar, vinegar, water, and mustard. Cook and stir until thick. Add butter and cool. Blend in mayonnaise. Refrigerate.