Mix dried fruit: Place raisins, golden raisins, and currants in a bowl. Chop the apricots, prunes, and dates and add them to the bowl.250 g raisins / 9 oz + 200 g golden raisins / 7 oz + 125 g currants / 4.5 oz + 125 g dried apricots / 4.5 oz + 125 g prunes / 4.5 oz + 100 g dates / 3.5 oz Soak dried fruit: Warm the brandy or rum and freshly squeezed orange juice in a small pan. Pour the mixture over the dried fruit, stir well, and let it soak for 30 minutes or until the fruit is plump. You can soak it longer if you prefer.125 ml brandy/ ½ cup + 125 ml orange juice/ ½ cup Preheat the oven to 150°C/ 300°F.
Line the cake pan: Lightly grease the springform or cake tin and line it with parchment paper all over, including the sides.
Insulate the pan (Note 5): Cut a long piece of foil, enough to wrap around the cake pan, and lay it flat on the table. Tear a strip of paper towels the same length as the foil and fold it twice lengthwise to form a long strip. Dampen the strip with water until it’s wet but not dripping. Place the wet paper towel in the center of the foil, then fold the foil around it to create an insulating strip. Wrap this strip around the cake pan, trimming any excess, and secure it with a metal paper clip.
Wet ingredients: Cream the butter and sugar for about 5 minutes or until pale and fluffy, scraping the sides of the bowl once or twice. Add the eggs one at a time, beating well after each addition and scraping the bowl halfway through.250 g unsalted butter / 9 oz/ 1 cup + 2 tablespoons + 225 muscovado sugar / 8 oz/ 1 cup packed + 4 large eggs Add dry ingredients: In another bowl, mix the flour, baking soda, salt, and spices. Sift them over the egg mixture and fold them in with a plastic spatula, along with the soaked fruit, chopped glacé cherries, and orange peel.275 g all-purpose flour / 9.7 oz/ 2 cups + ¼ teaspoon baking soda + ¼ teaspoon allspice + ¼ teaspoon cardamom + ½ teaspoon cinnamon + a few gratings of nutmeg + ½ teaspoon fine sea salt + 100 g glace cherries / 3.5 oz + 50 g candied orange peel / 1.7 oz Bake fruitcake: Pour the mixture into the prepared cake pan. Cover tightly with foil and bake for 90 minutes.
Reduce the oven temperature to 140°C/280°F, remove the foil, and bake for another 90 minutes, or until a skewer inserted into the center comes out clean. Check after about 70 minutes; if the cake is getting too dark, loosely cover it with foil (just place it on top without pressing it down).
Check cake: If the skewer has a lot of cake mix on it, when you check the fruitcake, continue baking for about 10 more minutes, then check again. Repeat if necessary. The cake is dense, and oven temperature variations may affect the baking time.
Cool the cake: Remove the cake from the oven and carefully take off the insulating foil strip. Let the cake cool completely in the pan.
Store fruitcake: Once cool, wrap the cake in parchment paper and then in foil. Store it in a cool place (not the refrigerator) for 1 to 2 weeks. Feed it if desired (Note 6).
Serve: Unwrap the fruitcake and sprinkle it with powdered sugar or brush it with jam before serving.