Brew a strong cup of coffee.
Add brown sugar to the hot coffee and stir until dissolved.
Pour in the Irish whiskey and mix well.
Carefully spoon the lightly whipped cream over the back of a spoon onto the coffee.
Ensure the cream floats on top without mixing.
Garnish with cocoa powder or chocolate shavings.
Serve immediately while hot.
Enjoy the layers of coffee and cream separately.
Experiment with different types of whiskey for unique flavors.