Candy Snack Cake

Ingredients:

• 1 cup butter, softened
• 1 cup sugar
• 4 large eggs
• 1 teaspoon vanilla extract
• 1 cup all-purpose flour
• 1/4 cup unsweetened cocoa powder
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• Chocolate Frosting, recipe follows
• Whipped cream, for topping, optional
• 1/4 cup butter
• 2 tablespoons unsweetened cocoa powder
• 3 tablespoons buttermilk
• 2 cups confectioners’ sugar
• 3 (2.07-ounce) candy bars cut into 1/2-inch pieces (recommended: Snickers)

Source