You can find that at a lot of American fast casual restaurants, albeit in varying quality.
Brownie a la mode
Sometimes served in a cast iron, not far from your dish.
You can find just about any desert a la mode, covered in ice cream. Absolutely delicious.
The company Edwards here in the states used to sell individual ones in the freezer aisle:
The ice cream was packed separate from the brownie. You’d microwave the brownie til it was super hot, and then plop the ice cream on top. I have really fond memories of those, but haven’t seen them in a long, long time. They tasted pretty good, but the ice cream was bottom of the barrel quality.