A dark, moist English Christmas cake packed with dried fruit simmered in rum and honey. Bake it 4–6 weeks ahead and brush it with rum once a week; one batch makes four gift-size loaves.
Cut all the dried fruit into pieces slightly bigger than a raisin.
Put the fruit in a heavy-bottomed pot with the orange zest and juice, spices, rum, honey, lemon juice, and vanilla. Bring slowly to a boil over low heat, cover, turn off the heat, and leave until completely cool.
Traditional method: mix the fruit with the orange zest and spices in a bowl. Stir the rum, honey, lemon juice, vanilla, and orange juice together, pour over the fruit, mix well, and cover. Keep somewhere cool (the fridge is fine) for a week, stirring once a day.
Batter and baking
Heat the oven to 275°F (140°C). Line four 8½ × 4½-inch (22 × 11 cm) loaf pans, or a slab frame set on a deep baking sheet, with parchment.
Beat the softened butter and sugar until light and fluffy.
Beat in the burnt sugar syrup, then the eggs, one at a time.
Whisk the flour, almond flour, cornmeal, and baking powder together and mix into the batter. Set aside 4–6 tablespoons of plain batter.
Fold in the fruit with all of its liquid until evenly mixed.
Divide among the pans and spread the reserved plain batter thinly over the tops.
Bake for 1½ hours, then cover with foil and bake 1½ hours more, until a skewer in the center comes out free of wet batter (a little sticky fruit is fine).
Take the cakes out of the oven and leave them in their pans.
Half batch: use the same pans and the same baking time — you'll get two loaves instead of four.
Feeding and maturing
Straight out of the oven, while the cakes are still in their pans, brush them generously with rum. Cover with foil and let cool.
Unmold the cakes (or cut the slab into four loaves) and peel off the parchment. Brush all sides with rum, then wrap in fresh parchment, foil, and a bag. Store in a cupboard at room temperature.
Once a week, unwrap the cakes, brush all sides with rum, and wrap them again. Keep feeding for 4–6 weeks; after week 4, every week and a half is enough.
Mature the cakes at room temperature, not in the fridge — the fridge keeps them, but the texture ends up less tender.
Royal icing (optional)
Whip the egg whites to soft peaks, then beat in the sifted powdered sugar a little at a time with the citric acid until thick, glossy, and spreadable.
Spread the icing over the tops and sides of the cakes and leave overnight at room temperature to set.
Chocolate-nut glaze (optional)
The day before serving, put the unwrapped cakes in the freezer for 4–5 hours.
Melt both chocolates with the oil in short microwave bursts or over a water bath, stirring. Stir in the toasted nuts.
Set a frozen cake on a rack and pour the glaze over it at 86–90°F (30–32°C). Glaze one cake at a time, collecting the drips and rewarming the glaze before the next.
Move the glazed cakes straight to the fridge so they thaw slowly. Store them somewhere cool, 50–57°F (10–14°C).
Notes
Keep the total dried fruit at about 1.85 kg (4 lb); the mix is up to you.The first, hot feeding matters most — that's when the cake drinks the most rum.Mature at room temperature, not in the fridge. After glazing, store at 50–57°F (10–14°C).