Sorry for the slow reply. I haven't been on in a couple of days and then I was having trouble with the site when I tried yesterday.
I'm sure I could lose my Canadian citizenship over this

, because what I call Nanaimo bars would not be considered authentic, BUT I just use a good, fudgy brownie for the base and then put the custard layer and chocolate layer on top. I have entered these into a brownie competition one time and won first place. Of course this alters the recipe significantly, as the original Nanaimo bar recipe is no-bake, while my version takes longer, given that you want your brownies cool before you put the next two layers on.
Another thing that I do differently is use almond extract in the custard layer in place of the traditional vanilla. This really puts them over the top, IMO. Of course now that Nanaimo bars are becoming popular even outside of Canada, there are any number of variations I have seen including cherry and mocha varieties.