Creating Hot Fudge Pudding Cake is simple when you follow these straightforward steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking dish or similar size.
2. Mix Dry Ingredients: In a large mixing bowl, combine the flour, granulated sugar, 2 tablespoons of cocoa powder, baking powder, and salt. Stir well to blend.
3. Add Wet Ingredients: Pour in the milk, vegetable oil, and vanilla extract. Mix until just combined, ensuring not to overmix.
4. Spread the Batter: Pour the batter evenly into the prepared baking dish, smoothing the top with a spatula.
5. Prepare Fudge Sauce: In a separate bowl, mix the brown sugar and ½ cup of cocoa powder. Sprinkle this mixture evenly over the batter.
6. Add Boiling Water: Carefully pour the boiling water over the top of the cake mixture. Do not stir; the water will create the fudge sauce as it bakes.
7. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the cake appears set on top.
8. Cool: Once baked, remove from the oven and let it cool for about 10-15 minutes before serving.
9. Serve Warm: The cake is best served warm, with the fudge sauce bubbling underneath.

These steps will guide you in creating this incredible cake effortlessly.