The butter mix with both types of sugar until blanching, add eggs one by one, pending the mixture to absorb completely. Add the juice and rind of oranges. At the end is added and flour with baking soda, baking powder and salt. Pour the chocolate and stir well to distribute evenly throughout the dough. In tray on kitchen paper, using tsp be scoops of the mixture and form balls, flatten slightly. Keep in mind that cookies doubling its volume and must leave enough distance between them, and not to make too big. Biscuits bake in preheated oven for no more than 10-15 minutes, toast you will become dry and crunchy. * Obtained 50-60 biscuits with great taste.