1. Preheat oven to 350 °F (180 °C) and grease two round cake pans.

2. In a large bowl, mix the flour, sugar, cocoa, baking powder, baking soda, and salt.

3. Add the eggs, milk, oil, and vanilla to the dry mix. Beat until well combined.

4. Add the boiling water and mix again until you get a smooth dough.

5. Divide the batter evenly and pour into the prepared pans.

6. Bake the cakes in the preheated oven for approximately 30-35 minutes or until a toothpick inserted in the center comes out clean.