Preheat the oven to 350°F. Line baking sheets with parchment paper or silpat mats.
In a medium bowl, whisk together the flour, baking soda, ginger, cinnamon, cloves, salt and cayenne pepper.
In a large bowl, use an electric mixer to beat the butter until light and fluffy. Add the brown sugar and white sugar and beat until blended. Blend in the molasses. Add the egg whites and beat until well-combined. Add the flour mixture 1/3 at a time and beat until blended after each addition.
Spread the rolling sugar on a small plate. Shape the dough into 3/4-inch balls and roll in the sugar until lightly coated. Arrange the balls 1 inch apart on the prepared baking sheets.
Bake 8 to 10 minutes or until brown. Cool on the cookie sheet for 2 minutes. Remove to a wire rack to cool completely. Store in an airtight container.