Instructions:
- Preheat the oven to 350°F (175°C).
 - Place the butter in a 9×13-inch (23x33cm) baking dish and put it in the oven until melted.
 - Once melted, remove from the oven and set aside.
 - In a medium bowl, mix 1 1/2 cups sugar, 2 tablespoons cocoa powder, flour, baking powder, salt, milk, and vanilla extract until well combined.
 - Pour the batter over the melted butter in the baking dish, but do not stir.
 - In another bowl, mix 2 cups sugar and 2 tablespoons cocoa powder. Sprinkle the mixture over the batter in the baking dish, but again, do not stir.
 - Pour the boiling water over the mixture in the baking dish, but do not stir.
 - Bake for 35-40 minutes or until the top is set. The bottom will be loose and gooey.
 - Let the cobbler cool for 15 minutes before serving. Serve with a scoop of vanilla ice cream.
 
Notes:
- This recipe is best served warm, with a scoop of vanilla ice cream.
 - Make sure to spoon the batter over the melted butter, but do not stir it.
 - Similarly, sprinkle the sugar and cocoa powder topping over the batter, but do not stir.
 - The bottom of the cobbler will be a bit gooey, which is part of the charm of this dessert.
 - Leftovers can be stored in the refrigerator for up to 3 days.
 
