Preparation Steps

• Preheat your oven to 350°F (175°C). Grease a 13x9 inch baking pan.
• In a large saucepan, combine the melted butter, Dr. Pepper, and cocoa powder. Bring to a boil, then remove from heat.
• In a large bowl, whisk together the flour, sugar, baking soda, and salt.
• Pour the hot butter and cocoa mixture into the dry ingredients and stir until combined.
• Add the buttermilk, beaten eggs, and vanilla extract to the mixture and stir until smooth.
• Pour the batter into the prepared baking pan and smooth the top.
• Bake in the preheated oven for 25 minutes or until a toothpick inserted into the center comes out clean.
• Let the cake cool completely in the pan before frosting or serving.