Place flour, shortening, salt, baking powder, and water in a 2 quart bowl with a form fitting lid. Place lid on securely. Shake for 45 seconds, or until it sounds mixed. Turn bowl on its side, and shake up and down for 15 seconds to form a ball. Open bowl, and scrape dough out. Form into two balls. Chill while preparing filling. Roll out and use as directed in your favorite recipe.