In a bowl, beat all the wet ingredients (eggs, yogurt, and oil) together with the sugar until you have a smooth mixture. In a separate bowl, sift the dry ingredients (flour, baking powder, and cocoa).

Combine the wet and dry ingredients, and finally fold in the chocolate chips, which have been dusted with a little flour. Pour the batter into a greased and floured loaf pan and place in a preheated oven at 350°F (180°C).

Bake the cake for 20 to 30 minutes or until a toothpick inserted in the center comes out clean. Once cooled, remove from the pan and sprinkle with powdered sugar if desired. This recipe was copied from somewhere online, but I never wrote it down. =(