Beat remaiing butter at low speed with an electric mixer until creamy. Gradually add powdered sugar, beating until blended. Increase mixture 2-3 minutes or until light and fluffly, stopping to scrape bowl as needed. Add eggs one at a time, beating at low speed, just until blended. Add vanilla. Gradually add flour and watr; beat 1 minute. Scrape bowl; increase mixer speed to medium and beat 2 minutes. Do not overbeat. Batter will be light and smooth.
|