My STP is altogether deeper and darker than the original version: it is still sweet, but the muscovado sugar and black treacle give it an almost savage intensity. It seems redolent of ginger, cloves, allspice – and yet none of these spices are used. It’s a miracle. I don’t understand it – but then, miracles are not to be questioned.
source https://www.bbc.co.uk/food/recipes/sticky_toffee_pudding_05454