5 tbsp. flour
1/2 c. sugar
1 c. milk
1/2 c. soft butter
1/2 c. shortening
1/2 c. sugar
2 tsp. vanilla

Combine flour and 1/2 cup sugar. Mix until dry. Add milk and cook until thickened. Cool well. Cream together butter, shortening and remaining 1/2 cup sugar slowly until sugar is dissolved. Add to cooled flour mixture, then add vanilla. Beat until creamy.