If you don't know how to make it, don't put it on your menu, don't accept the order, don't have a button for it on your computer and don't try to hand off your creation to the person in the drive through who will be pulling away before they notice. I'm not asking for much.
They screwed up a mud pie blizzard. I love mud pie blizzards and could have most likely given them most of the things you add to create it. Instead I got an Oreo blizzard with what tasted like maybe a half a shot of coffee - but not much at all because it was still just as white as a regular Oreo blizzard. Sigh... so sad. I finally treat myself and they screw it up. We also ordered a large dipped cone that came out looking like a kids sized/small. We actually sent it back for them to re-make. Sent back ice cream. You know it went uneaten. So sad.
But - they have an amazing menu of food. More food than I feel like I see at other locations. But of course we were here for ice cream - not food. And if memory serves from when I worked in the area, they do a decent job with that - though nothing that makes you want to go running back.
It's convenient. And with Carvel closed down in the area, it might be getting a little more action.