Very good recipe, pleased my husband no end! I added a handful of golden raisins. Regarding the unknown cooking time; I steamed this pudding for about 1hr. 50mins, and it was fine. Obviously a pressure cooker would do the job in a much shorter time. Will try that next time. I used my large pasta pot with the colander insert, made lifting the pudding out easier. Will definitely make this again, with or without the black treacle, this pudding is delicious!