Different presentation than what we do, but a warm chocolate chip cookie...
...on the bottom and a scoop of good quality vanilla ice cream, along with a squirt of chocolate syrup sure does it for me and my brood!
Restaurants out here make a large cookie for the base (maybe 5 inches across) and serve it with ice cream and choc syrup. They call it a "pizookie" -as in "pizza + cookie".
I have a memory from when I was around 5 years old that sticks with me.
We lived across the street from a dairy farm (downwind too!) and I remember looking out our front window and watching a teenager (maybe about 13?) drink chocolate milk straight from a 1/2 gallon jug.
I thought that was the coolest thing imaginable. I can still see him in my mind's eye!