Step 2: Make the Cake Batter

1. In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt.
2. Add the eggs, buttermilk, vegetable oil, and vanilla extract. Beat on medium speed until smooth.
3. Stir in the boiling water last—the batter will thin out, but this step enhances the chocolate flavor and moistness.
4. Divide the batter evenly between the prepared pans.

Step 3: Bake the Cake

1. Place the pans in the preheated oven and bake for 35–40 minutes, or until a toothpick inserted into the center comes out clean.