Mix flour with baking powder and stir into the sugar mixture: blend thoroughly
Cover and chill the dough for 2-3 hours (or overnight)
Preheat oven to 375°F
Directly on greased baking sheets, without sides, shape the dough with your hands to form flat loaves that are about 1/2 inch thick and 2 inches wide, as long as the baking sheet. Place no more than two loaves parallel and well apart.
Bake for 20 minutes
Remove from oven and let loaves cool on pans until you can touch them.
Cut in diagonal slices that are about 1/2″ to 3/4″ thick.
Lay slices on cut sides close together on baking sheets and return to 375° F oven for 15 minutes or until lightly toasted.
Cool on wire racks and store in air tight containers or freeze