Cracker Barrel Double Chocolate Fudge Coca-Cola Cake

Name: Cracker Barrel Double Chocolate Fudge Coca-Cola Cake
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Cuisine: American
Ingredients: 4 ounces butter; 1 cup Coca Cola; 1 ounce baking chocolate (1 square); 3/4 cup miniature marshmallows; 1/2 cup shortening; 1/2 cup vegetable oil; 2 cups sugar; 2 eggs; 2 teaspoons vanilla; 3/4 cup buttermilk; 2 1/3 cup all purpose flour; 1 teaspoon baking soda; 1 1/2 teaspoons baking powder; 1/2 teaspoon salt; 3/4 cup cocoa; 1/4 pound butter; 3 tablespoons cocoa; 1 pound powdered sugar; 6 tablespoons heavy cream; 1 teaspoon vanilla extract