01 -
Preheat oven to 175°C (350°F). Place butter in a 23×33cm (9×13-inch) baking dish and set in oven until completely melted. Remove dish and set aside.
02 -
In a large mixing bowl, combine 300g granulated sugar, 60g cocoa powder, flour, baking powder, salt, milk, and vanilla extract, stirring until thoroughly mixed.
03 -
Spoon the batter evenly over the melted butter in the baking dish. Do not stir the mixture.
04 -
In a separate bowl, blend the remaining 400g of granulated sugar with 60g cocoa powder until well integrated.
05 -
Sprinkle the sugar-cocoa topping mixture evenly across the batter surface, then carefully pour the boiling water over everything. Do not stir.
06 -
Bake for 35-40 minutes, or until the top layer has set while maintaining a loose, gooey bottom layer.
07 -
Allow cobbler to cool for 15 minutes before serving warm with a scoop of vanilla ice cream.