What are your favorite complicated chocolate cakes?

I’m looking for a cake that takes a lot of effort, uses complicated ingredients and will impress the POTUS. Or, at least, chocolate lovers in a very fancy restaurant. Can you impress me?

Oh, I think chocolate goes well with coffee, amaretto, mint and orange (and possibly lemon). I’m willing to experiment with other, less traditional things, like passionfruit and maybe coconut. Peanuts are forbidden. Any recipe with peanuts will be flagged as non-responsive. You have been warned! I prefer using fresh ingredients, like mint leaves and orange zest. The cakes needs to be rich, yet well-balanced, and not too heavy. I use high-fat butter. Oil had better not be an ingredient.

We’re talking death by chocolate here. Go for it!