Yes, you definitely can! If you loved how the pudding turned out, and want to whip it up for some friends or guests coming over, you can actually completely bake it up to 2 days in advance. Just remember to allow the pudding to cool down completely, cover the dish up with cling wrap or foil and then refrigerate it.  Then, when you want to serve it, just unwrap it and microwave it until it is hot all the way through.