Meanwhile, in small bowl, mix powdered sugar, remaining 1/2 teaspoon of the orange extract, remaining 1/2 teaspoon of the orange peel and 2 to 3 teaspoons water until smooth and thin enough to glaze. Remove baking cups from muffins, if used. Spoon and spread glaze over muffins, allowing some to drip down sides. Serve warm. Store covered.