Preheat oven to 325 degrees. Butter a 9-inch tube or Bundt pan. Line the pan with wax paper and butter the wax paper.
 
Sift together flour and baking soda. In a separate bowl, mix together eggs, mincemeat, condensed milk, fruits and nuts. Slowly fold in dry ingredients. Pour mix into papered pan and bake until the middle springs back when pressed with a finger, which should take one to two hours. Cool in pan on a baking rack. Remove from pan and take off wax paper. Dust top with powdered sugar. Slice and serve.
 
To preserve cake, soak some cheesecloth in brandy or rum, then wrap the cake in the wet cheesecloth. Next, wrap the cheesecloth-covered cake in plastic wrap and then aluminum foil. Store the wrapped cake in a cool, dark place.