FYI, I also "cheat" when I'm short on time and use a packaged (fudgy) chocolate cake mix...with the MB filling recipe and baking times, etc. Comes out great!
Silicone cupcake pans work great for either version.
I've never tried making their cake recipes, but I've eaten their cakes at their cafe many times (used to live 3 blocks away) and they're very good. I make a cupcake based on their famous cupcake recipe which comes out great.