And it did. My dad already had a few bites that same night and some more the next morning. I tried it out later, and it is a perfect mix of marshmallow treats with chocolate bar, not too sweet, with a slight nutty flavor from browning the butter (like I did on the Brown Butter Crispy Treats), rich chocolate with a little espresso powder to bring out more chocolatyness (did I just made up a word?) and a touch of sprinkles just because I can.
You could replace the espresso powder with a little bit of instant coffee or even a bit of cayenne pepper, and maybe add a bit of nuts. Go crazy. Mix and match. then enjoy the fruit of your creativity!