Non-Dairy Whipped Cream Frosting

4 tbsp flour

1 cup soy milk

1/2 c. margarine

1/2 c. shortening

1 cup sugar

2 tsp. vanilla

pinch salt

Mix flour and soy milk in saucepan making sure it has a very smooth consistency. Cook over low heat, stirring constantly, until thickened. Put in bowl and cool completely. Cream margarine and shortening about 4 minutes. Add sugar gradually and beat another 4 minutes. Add flour paste and beat another 4 minutes. Add vanilla and salt and blend. Makes enough for a fill and frost a 9" layer cake, one large cake, or one batch of cupcakes. Keep refrigerated until ready to serve.