Delicious and easy to make.  It originally comes from Germany and can also be called Königskuchen.  It is best baked the day before and will keep for a long time  in a cool place. If you have  got no guglhupf  baking tin , use two 1 lb loaf tins.
 
Ingredients
8 oz  (225 g ) unsalted butter ( soft )
6 oz  (170 g ) caster sugar
4 large eggs
1 lb (450 g ) self raising flour or plain flour with 6 level  teaspoons of baking powder ( sifted )
4 oz  (110 g ) sultanas
4 oz  (110 g ) currants
4 oz  (110 g ) candied , chopped orange and lemon peel (mixed )
grated rind of one lemon ( unwaxed or organic )
4 tablespoons of rum
a little vanilla extract
pinch of salt
1 or  2 tablespoons of milk, if needed

1.  cream the butter and sugar together until light and fluffy
2.  add vanilla essence, grated lemon rind and pinch of salt and mix in
3.  stir in 1 egg at a time with some of the sifted flour, 
4.  mix in the rum and stir in gradually all the flour
5.  if the mixture is too dry add some milk ,but the cake mixture should not be to runny as the fruit would sink to the bottom while baking. 
6.  now add your sultanas, currants, mixed peels and mix all together. 
7.  put cake mixture  into a baking tin, which has been greased and dusted with flour , place in oven and bake.
8.  check if ready by inserting a skewer and if it comes out clean it is ready.
9.  allow the cake to cool for a few minutes in the tin , then turn out onto wire rack to cool completely and
dust with icing sugar. 

Source:  www.myhouseandgarden.com