1 c. milk
5 tbsp. flour
1 c. butter
1 c. sifted 10x sugar
1 tsp. vanilla

Combine milk and flour in saucepan and bring to boil over medium heat stirring constantly. Cook until smooth and thick. Place in refrigerator until cool. Cream and beat together butter and sugar and vanilla until fluffy. Add flour mixture and beat at high speed until very soft, light and fluffy. Must be kept refrigerated.