Preheat the oven and grease a loaf pan.
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, salt, and cocoa powder.
Add the eggs, milk, vegetable oil, and vanilla extract to the dry ingredients and mix until well combined.
Stir in the boiling water until the batter is smooth.
Pour the batter into the greased loaf pan and smooth the top.
Bake in the preheated oven for about 60-75 minutes, or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for 10 minutes, then remove from the pan and let cool completely on a wire rack.
Optional: Top with a chocolate glaze or serve as-is with toppings like mini chocolate chips, chopped nuts, or fresh fruit.
