2 glasses. One iced down. Other one 2 sugar cubes and 4 dash bitters muddled. Full shot of rye whiskey. Stir to dissolve sugar. Pour out ice from chilled glass and wash glass with a little absinthe. Pour absinthe out (give excess to customer with water added to shot glass) and add sugar whiskey to absinthe washed glass. Lemon twist ( coat rim).