Stir together breadcrumbs, suet, milk, sugar, baking powder, cinnamon, mace, and cloves in a 6-quart mixing bowl until well combined. Stir together currants, flour, raisins, citron, lemon peel, orange peel, and cherries in a separate large bowl until combined. Add currant mixture to breadcrumb mixture; stir well to combine.

Spoon about 3 1/4 cups packed mixture into each of 5 lightly greased (with cooking spray) cleaned 1-pound coffee cans or pudding molds. Cover cans with a double thickness of aluminum foil; secure foil with kitchen twine. (Alternatively, tightly cover molds with lids.)

Place cans on a shallow rack fitted inside a large, deep stockpot; add enough boiling water to come halfway up cans. Cover stockpot; steam puddings in continuously simmering water over medium-low heat until firm and cooked through, 3 to 4 hours, adding more boiling water as needed to maintain water level. Remove from heat. Transfer pudding in cans to a wire rack; let cool 10 minutes, then turn upside down to unmold. Slice and serve warm with Hard Sauce.

To store puddings, wrap each unmolded pudding in plastic wrap. Store in refrigerator up to 5 days. To reheat, unwrap and microwave on HIGH until warmed, 20 to 30 seconds.