double chocolate coca-cola cake

Ingredients For double chocolate coca-cola cake

• 1 c

  coke (regular not diet)
• 1/2 c

  oil
• 1 stick

  butter
• 3 Tbsp

  cocoa
• 2 c

  sugar
• 2 c

  flour
• 1/2 tsp

  salt
• 2

  eggs
• 1/2 c

  buttermilk
• 1 tsp

  baking soda
• 1 tsp

  vanilla
• FROSTING
• 1 stick

  butter
• 3 Tbsp

  cocoa
• 6 Tbsp

  cream or milk
• 1 tsp

  vanilla
• 3 3/4 c

  powdered sugar
• 1/2 c

  chopped walnuts (optional)