This recipe was loosely inspired by a popular beverage served in Hong Kong cafes which combines HK-style milk tea (strong brewed black Ceylon tea + evaporated or condensed milk) with a smaller amount of strong black coffee. It is called 'yuan yang' in Chinese - the name, a nod to the Chinese philosophy of balance & harmony or 'Yin Yang' i.e. the bitterness of coffee balances the creamy roundedness of the milk tea.