Sourdough Chocolate Cake

Sourdough Chocolate Cake
1 cup thick sourdough
1 1/2 cups flour
1 cup warm milk
Mix: allow to ferment for 2-3 hours until it is light and bubbly.
Then in a separate bowl blend:
2 cups sugar
2 eggs
4 squares baking chocolate, or 1/3 cup cocoa
1/2 tsp of salt
1/2 cup margarine
1 tsp vanilla
3/4 tsp soda
Blend the sugar and margarine together with a pastry blender. Add cocoa or melt the chocolate and add to the above mixture. Add eggs, vanilla, salt, and soda. Mix thoroughly with the sugar, margarine, and chocolate mixture. Blend this mixture with the sourdough. Pour batter into a large greased cake pan. Bake at 400 F. for 25-30 min. or until done. The topping I like best is whipped cream with cocoa and sugar added. If your cake falls, call it Brownies.