Sweet May Dressing - cooking recipe

Ingredients

1/2 c. butter
1/2 c. sugar
4 egg yolks, beaten
pinch of Coleman's dry mustard
2 Tbsp. vinegar
1/2 pt. whipped cream

Preparation

Cream butter and sugar together.
Add egg yolks, mustard and vinegar.
Cook in double boiler until thick.
Add whipped cream before serving.