Preheat oven to 350°.
Beat granulated sugar and butter at medium speed of a mixer until well-blended. Add juice, molasses, and egg substitute; beat well, and set aside.
Lightly spoon flour into dry measuring cups; level with a knife. Combine the flour and the next 6 ingredients (flour through nutmeg) in a small bowl; gradually add flour mixture to molasses mixture, stirring until well-blended. Pour batter into an 8-inch square baking pan coated with cooking spray. Bake at 350° for 25 minutes or until a wooden pick inserted in center comes out clean. Cool gingerbread in pan on a wire rack. Sprinkle with powdered sugar.