1 box brown sugar
1-1/2 c white sugar
9 level T flour
3 eggs
1 stick buttermilk
3  t vanilla

Mix sugar, flour and egg yolk. Melt margarine. Add remaining ingredients. Add beaten egg whites last. Pour in unbaked pie shells (3) and bake at 450 degrees for 10 mii"iutes, then at 350 degrees for approximately 30 minutes.
Source: Aunt Ella Cooper