In the bowl of an electric mixer, combine the brown sugar, applesauce and molasses. In another bowl, combine the flours, baking powder, baking soda, spices and salt. Add to the wet mixture.
Form the dough into a loaf that measures approximately 4 inches wide by 8 or 9 inches long.
Bake on a parchment (or silpat) lined baking sheet for about 30 minutes. The loaf should be firm but not crispy.
Allow to cool for 10 minutes. Meanwhile, reduce the oven temperature to 300 degrees.
Using a serrated knife, slice the loaf on the diagonal about 1 inch thick. Put the slices back on the lined baking sheet and bake for 15 minutes. Flip them once, baking another 15 minutes until firm and crunchy.
Optional: Melt 1/4 C of white chocolate + 1 tsp of oil or shortening & microwave. Dip into melted white chocolate and sprinkle with coarse sugar.