Chocolate Cake With Icing with margarine

2 cups flour 2 cups granulated sugar 1 teaspoon baking soda 1 pinch salt 8 tablespoons unsalted butter , cut up 8 tablespoons margarine , cut up 1 cup water[...]

1 1/2 teaspoons baking soda 1 cup buttermilk 3/4 cup hershey's cocoa 3/4 cup boiling water 1/4 cup butter or 1/4 cup margarine , softened 1/4 cup shortening 2[...]

2/3 cup Splenda granular 2/3 cup all-purpose flour 1/3 cup cocoa 1 teaspoon baking powder 1/4 teaspoon salt 1/3 cup soft margarine 2 eggs 1 teaspoon vanilla[...]

1/2 cup butter or 1/2 cup margarine 4 ounces unsweetened chocolate 1 1/2 cups sugar 2 teaspoons vanilla extract , divided 1 3/4 cups buttermilk 3 large eggs 1[...]