Grease four 10 cm x 18 cm loaf pans. Line base and sides with baking paper. Place pans on two oven trays.
Combine banana, syrup and sugar in a large bowl. Stir in eggs, oil and milk. Add flour and stir until combined. Divide mixture among prepared pans.
Cook in a moderate oven (180C) for about 1 hour, or until cooked when tested, swapping trays halfway through cooking. Stand for 5 minutes before turning out onto a wire rack to cool.
Dust with sifted icing sugar and decorate with ribbon.