Cold Oven Pound Cake

2 sticks margarine
3 cups sugar
3 cups plain flour
1/4 tsp salt
1/2 cup Crisco shortening
6 eggs
1/2 tsp baking powder
1 cup milk
1/2 tsp vanilla

Cream margarine, shortening, and sugar. Add eggs one at a time. Keep it under beater at all times. Add flour, milk, then other ingredients. Pour into greased and floured 10" tube pan. Put in cold oven. Turn on to 350 and bake 1 hour 15 minutes. Do not open oven until done. Cool on rack.