Granny Briggs' Coca Cola Cake - The Elegant Artisan

Ingredients

• 2 cups flour
• 2 cups sugar
• 1 cup cola
• 1 cup vegetable oil
• ½ cup butter
• ½ cup buttermilk
• ½ cup miniature marshmallows
• 2 eggs
• 3 tbsp ccoa powder
• 1 tsp baking soda
• 1 tsp vanilla
• ½ tsp salt
• 1 lb powdered sugar
• 1 cup chopped walnuts or pecans (optional)
• 6 tbsp cola
• 3 tbsp cocoa powder