Take a coffee plunger and place 2 tablespoon good quality freshly ground coffee in it. Carefully pour in 1 1/2 cups of boiling water. Stir the mixture until mix thoroughly. Set it aside for approximately five minutes at room temperature.
Meanwhile, take two Irish coffee glasses, cups, or mugs. Divide the 1/4 cup of Irish whiskey equally among the two cups.
Now, pour in the coffee and gradually stir in the 2 to 4 tablespoon brown sugar to the cups.
Your Irish coffee cocktails are almost ready; carefully float the whipped cream on the top of your cups. garnish your cups if you want and serve your Irish coffee cocktails immediately.