Preheat your oven to 350°F (175°C).
Grease and flour your Bundt pan.
In a large mixing bowl, whisk together the dry ingredients: flour, cocoa powder, baking soda, baking powder, and salt.
In a separate bowl, mix together the wet ingredients: sugar, eggs, milk, oil, and vanilla extract.
Gradually add the wet mixture to the dry ingredients, stirring until combined.
Carefully stir in the boiling water until the batter is smooth.
Pour the batter into the prepared Bundt pan.
Bake for 45 to 50 minutes, or until a toothpick comes out clean.
Allow the cake to cool in the pan for 10 minutes, then invert onto a wire rack.
Let the cake cool completely before frosting.
Frost with your favorite chocolate icing or glaze, if desired.