Preparation Steps

• Preheat oven to 350°F (175°C). Grease and flour a bundt pan.
• In a large bowl, whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt.
• In a separate bowl, combine buttermilk, oil, eggs, and vanilla extract. Add wet ingredients to dry ingredients and mix until just combined. Do not overmix.
• Divide batter in half. Leave one half plain. To the other half, add 2 tablespoons cocoa powder and 2 tablespoons hot water. Mix well.
• Spoon alternating dollops of plain and chocolate batter into the prepared bundt pan. Swirl gently with a knife or skewer to create a marbled effect.
• Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
• Let cool in the pan for 10 minutes before inverting onto a wire rack to cool completely.