3
In 2-cup microwavable bowl or measuring cup, stir 1 box gelatin into 1/4 cup water. Microwave uncovered on High about 1 minute 30 seconds or until mixture boils, stirring 2 to 3 times to dissolve gelatin. In large bowl, beat gelatin mixture, icing sugar, butter, lemon juice and 2 teaspoons water on low speed until frosting is thick but spreadable. (Add additional 1 teaspoon water if needed to make frosting spreadable.)