• Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking pan.

Make the Cake Batter:

• In a medium saucepan, combine 1 cup of Coca Cola, 1 cup of butter, and 1/4 cup of cocoa powder. Heat over medium heat, stirring occasionally, until the butter is melted and the mixture is smooth. Remove from heat and let cool slightly.
• In a large bowl, whisk together the sugar, flour, baking soda, and salt.
• Gradually add the Coca Cola mixture to the dry ingredients, stirring until combined.
• In a small bowl, whisk together the buttermilk, eggs, and vanilla extract, then stir this into the cake batter.
• Bake the Cake: Pour the batter into the prepared baking pan and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool in the pan for about 15 minutes before frosting.

Prepare the Frosting:

• In a small saucepan, combine 1/2 cup of butter, 1/4 cup of Coca Cola, and 1/4 cup of cocoa powder. Heat until the butter is melted and everything is combined.
• Remove from heat and whisk in the powdered sugar and vanilla extract until smooth. If you’re feeling indulgent, stir in a handful of chocolate chips for an extra chocolaty touch.
• Frost the Cake: While the cake is still slightly warm, pour the frosting over the top and spread it evenly with a spatula. Let the frosting set for a few minutes before serving.