1 Preheat oven to 325°F.2 In medium bowl, mix together flour, sugar, cocoa, baking soda, baking powder, salt, cinnamon and white chocolate. Add eggs, vanilla and just enough water to form stiff dough. 3 Knead 8 to 10 times. Form dough into a log about 16-inches long, 2-inches wide and 1-inch thick.4 Place log onto baking sheet coated with non-stick spray. Bake 30 minutes; remove from oven and cool for 10 minutes.5 Place log on cutting board and with a serrated knife, cut log diagonally into ½ inch slices, using a sawing motion.6 Place slices cut side up, on baking sheet and bake for 10 minutes; turn slices over and bake an additional 10 minutes. Centers will be slightly soft, but will harden as they cool. Remove to wire rack to cool.