Combine refined flour, cocoa powder, baking powder, baking soda and salt in a bowl. Mix well.
Break eggs in another bowl. Add brown sugar and beat well. Add vanilla essence and beat again.
Add oil to the flour mixture and mix. Add 1 cup buttermilk and mix well.
Add egg mixture and chocolate and mix well into a smooth batter. Add remaining buttermilk and mix well. Add orange marmalade and mix again.
Heat a waffle machine and grease with a little oil. Pour batter on it, cover and cook till fully done.
Serve hot with butter and honey.