Preheat oven to 180ºC . Grease and flour cookie sheet. In a large bowl, sift the flour, sugar, baking powder and salt. Make a well in the center of the mixture; add the remaining ingredients and mix well. Divide the dough in half. Shape each half into flat-bottomed cylinders (1-inch high x 6 cm wide x 20 cm long). Bake 30-35 minutes or until brown on top. Remove from oven and cool slightly. Cut into 2 cm slices. Return to oven with cut side down for 15 minutes or until slices are brown. Remove from oven and cool on racks.