1/2 c. granulated sugar
1/3 c. flour
1/3 c. milk
1/3 c. shortening
1/4 c. butter
1 tsp. vanilla

Put all ingredients into a mixing bowl and beat on a very low speed, as mixture splatters. When mixture thickens, speed may be increased. Keep beating until it reaches the consistency of whipped cream and sugar is dissolved (about 5-10 minutes).