I was craving shortbread and caramel so I decided I'd make a batch of millionaire bars and if you like Twix candy bars then you'll definitely love these! These bars are extremely easy to make but it takes time to get them layered together. When you make the shortbread crust, it must completely cool before you add the caramel layer, that itself takes about 20-25 minutes. After you add the caramel, you should wait about 30 minutes before you add the melted dark chocolate. But once you cool the entire thing off for about 15 minutes and refrigerate for about an hour, then they're ready to be devoured to your hearts content!! Don't they look delicious?