1. Combine water and instant coffee in a 6-cup microwave-safe glass pitcher. Microwave, uncovered, at Time Cook (power level 10) for 8 to 10 minutes, or until very hot, stirring once.
2. Stir orange liqueur into coffee and pour into mugs. Top each mug with a dollop of cream that has been whipped with 2 tablespoons confectioners' sugar. Sprinkle whipped cream with grated orange peel.