In full disclosure, I will confess that I originally found this recipe here (I changed the cooking time a bit. You may need to cook it even longer). I didn't make it up myself, though I'd love to take credit for it. What I DID do, though, was buy a deep dish graham crust on accident. Which meant I had to double everything in the recipe to fill it up. Darn.
Trust me. You will love every last morsel. And then, you might lick the plate. Just saying.