Whips eggs well. Add flour, sugar, salt and baking powder to large bowl and mix well. Mix in the goodies. Lick bowl! Place in 8x3x4 cake pan. If you use pan, line it with wax paper. I use tin foil. It's much easier to wrap as a gift. Bake at 160ºC or 1.5 hours. Use a toothpick to see if done. You should not get anything but chocolate. There should be a good crust and be brown. Make sure not too soft in the middle.