FOR THE CAKE: Blend flour, sucanat, cocoa and salt together in mixing bowl. Slowly add oil, vinegar and vanilla; blend well. Add baking soda; blend. Slowly add water, mix 1 minute until wellblended. Pour mixture into well-greased sheet pan and bake at 350°F or until cake tester comes out clean. Remove from oven; cool before frosting.
FOR THE FROSTING: Combine all frosting ingredients and mix well until blended. Scrape down bowl and mix again. Refrigerate until ready to use.