Combine eggnog, brown sugar, instant coffee and spices in a large mixing bowl; beat at low speed with an electric mixer until sugar dissolves. Chill 15 minutes; stir until coffee granules dissolve and stir in whiskey. Cover and chill at least 1 hour. Pour into punch bowl or individual cups, leaving enough room for ice cream. Spoon in ice cream. Garnish each serving as desired with whipped cream and nutmeg.
Irish Coffee Eggnog Punch
