Fill a glass stemmed Irish coffee mug or brandy snifter with hot water; discard it and refill the glass with boiling water.
Discard the boiling water and fill the glass a bit over half-full with the strong hot coffee. Add 1 to 2 teaspoons sugar to suit your taste; stir to dissolve the sugar.
Add an ounce of Irish Whiskey.
TO FLOAT THE CREAM ON TOP: turn a small dining spoon upside down and holding it at a 45 degree angle with the tip of the spoon touching the glass just above the surface of the cocktail, slowly pour the cream onto the back of the spoon allowing it to flow over the sides of the spoon float on top.