Preheat the oven to 350 degrees F. Fill the kettle with at least 2 cups of water and turn it on now so your water is boiled when you need it. Butter an 8 x 11 casserole style, oven safe dish.
Directly in the casserole dish, stir together flour, sugar, cocoa powder, baking powder, espresso powder, salt and stir together thoroughly.
1 cup all-purpose flour, ½ cup sugar, 3 tablespoon unsweetened cocoa powder, 1 teaspoon espresso powder, 2 teaspoon baking powder, ½ teaspoon salt
Pour 2 tablespoon of melted butter, milk and vanilla extract over the dry ingredients and stir well. This will make a thick, paste-like batter.
½ cup milk, 2 tablespoon butter, 1 teaspoon pure vanilla extract
In a separate small bowl or pyrex measuring cup, mix together the brown sugar, cocoa powder, orange zest, orange juice and boiling water. Stir until all the sugar dissolves. Pour this hot mixture over the dough in the casserole dish. Do not stir at all!
½ cup brown sugar, 3 tablespoon unsweetened cocoa powder, 2 tablespoon orange zest, ½ cup orange juice, 1 cup hot water
Place the dish immediately in the oven and bake for 25-30 minutes. Sprinkle on some icing sugar for a pretty finish.
Serve immediately with a dollop of whipped cream sweetened with maple syrup or vanilla ice cream. Enjoy!