How to Make German Chocolate Cake?

Ingredients: 2 1/4 cups of all purpose flour, 1 1/2 cups of granulated sugar, 1 1/2 teaspoons baking soda, 1/4 teaspoon salt, 1 cup of butter, 1 cup sour cream, 4 large eggs, 4 ounces sweet baking chocolate, 1/2 cup milk, 3/4 teaspoon vanilla extract. Mix ingredients in a bowl and put into pans. Bake on 350 for 35 minutes.