These versatile copycat Nanaimo bars can be tweaked around a lot when it comes to the ingredients you add. While almonds are typically added to the bottom crust layer, you could opt for any other kind of nut that you prefer- walnuts, pistachios, or even pecans.  You could also use crushed salted peanuts- they taste amazing!  To bring in a bit of extra fanciness into the bars, you can sprinkle some espresso powder (or cocoa powder) on the top, right before you serve.  Another cool idea is to layer some mini marshmallows on the custard layer after you get it out of the refrigerator, and then pour the melted chocolate on the top. Now you’ve got yourself some smores Nanaimo bars!