In mixing bowl, whisk flours, baking soda, ginger, cinnamon, pepper and salt.
In separate bowl, use electric mixer on medium-high to beat shortening sticks with 1/2 cup sugar for two minutes. Add molasses and egg white; beat three minutes. Set mixer on low speed and mix in dry ingredients to combine. Don’t overmix. Batter will form soft ball.
Place remaining sugar in wide, shallow bowl. Pinch about one tablespoon of batter and roll it between your palms, forming 1-inch ball. Place ball in bowl with sugar and roll to coat, then place on light-colored, ungreased baking sheet. Repeat, spacing balls 2 inches apart. Discard leftover sugar. Using bottom of a glass, press to flatten each ball into 1-by-3-inch disks.