Plum duff is a traditional British steamed pudding made with dried fruits — historically called "plums" — along with spices and a splash of brandy. Steaming keeps the pudding dense and moist, and the brandy adds warmth to the fruit-forward flavor. It takes roughly 2 to 3 hours of steaming, making it a good make-ahead dessert for cold-weather occasions.
Mix all the dry ingredients in a large bowl, ensuring they are thoroughly combined.
Add in the suet or finely chopped butter, currants, and raisins to the dry mixture, coating them well to evenly distribute.
In a separate bowl, whisk together the beaten eggs and brandy (if using). Pour this mixture into the dry ingredients, mixing until you achieve a sticky and cohesive dough.
Grease the pudding basin and transfer the mixture into it, lightly pressing down to avoid any air pockets.
Cover with a layer of greaseproof paper and then foil, securing with a kitchen twine to keep it watertight.
Steam the pudding in a pot for about 3 hours. Ensure the water level is maintained and does not touch the basin.
Remove from heat and let cool slightly in the basin before turning out onto a plate.
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Notes
Ensure the steaming pot is not left unattended to prevent the water level from falling too low.
Soaking fruits overnight amplifies their natural sweetness and adds depth to the flavors.