100%, the most delicious Christmas cake my family and I have ever had. We have it, by tradition, every year, a couple of times through December and January. A must have for the Christmas Season!
You will need:
Electric mixer with beater and dough hook
2 litre bowl
Kitchen scales
Flexible spatula
20 cm square cake tin
Sift plain flour, mixed spice, and cinnamon into a 3 litre bowl. Add salt if necessary.

Into bowl of electric mixer add the dark brown sugar. Cut butter into 1 cm cubes and with the blender on slow speed, fitted with beater blade, add to the brown sugar. Add black treacle, marmalade, and vanilla essence. You may need to occasionally scrape the sides of the bowl with the flexible spatula to ensure everything is mixed.

For this step you may need to increase the speed of the blender slightly. Add one egg at a time to the mix along with 3 or 4 heaped tablespoons of the dry mix until all the eggs and dry mix are in. Add the milk.
Remove the beater blade and replace with the dough hook. With the blender on slow speed add the mixed fruit, sultanas, glace cherries, and nuts if required.

Bake for 2 to 2 1/2 hours in a pre-heated fan oven at 140° C / 284° F. Check that the cake is completely done by inserting a dry knife.

Mmm, delicious!