I have made this a couple times. At least once each with Keebler's Simply line of butter cookies, and with homemade butter cookies. I don't feel the cookies stand out much, so I'd used whatever's quick/cheap.
It is very rich, so I've decided my go-to pan/shape for this dessert is a mini muffin pan. I used paper muffin liners, and it was a bit of a pain to unwrap them, but really a more appropriate size. You will still have plenty of ganache to cover the extra surface area.
The chocolate, honey and bourbon are a great combination in this recipe, altering the flavor profile a bit from your everyday chocolate desserts. It is definitely does not have a traditional cake texture or lightness, but I wouldn't just call it melted chocolate either.
The word cake in the title is VERY misleading. It is melted chocolate, period. Good melted chocolate but not worth the expense or calories. There are much better chocolate desserts.
Very large serving for the richness of the dessert. Used dark chocolate morsels. Would mold in mini cupcake pan for a bite sized serving. Served with vanilla frozen yogurt with a drizzel of sauce.