Preheat waffle iron. In a large mixing bowl, stir together flour, baking powder, salt, sugar and cocoa. Stir in milk, eggs and butter until mixture is smooth.
To make hard sauce: stir together softened butter, confectioners' sugar, vanilla extract and milk. Sauce should be fairly stiff.
Spray preheated waffle iron with non-stick cooking spray. Pour mix onto hot waffle iron. Cook until golden brown. Serve hot with hard sauce.
