method
You will need 1 part Irish whiskey to 3 - 4 parts double-strength coffee. Warm some goblets, put 1 measure of the whiskey in each glass and add 5 ml (1 level tsp) brown sugar. Pour in black coffee to within 2.5 cm (1 in) of the brim and stir to dissolve the sugar. Fill to the brim with chilled double cream, poured over the back of a spoon, and allow to stand for a few minutes. do not stir,
drink the coffee through the layer of cream