According to Foodbeast, The Ice Cream Brrrger, as Carl's Jr. is calling it, features a "patty" of chocolate ice cream, and the aforementioned icing sauces sandwiched between two sugar cookie "buns." It's sold for $1.99.
It's being tested in a least a few locations in Orange County, CA.
Personally, the icing looks gross; they should just ditch it and offer the ice cream sandwich as an alternative to the Oreo Ice Cream Sandwich currently on the menu. Although, I suppose some children might like the idea of eating a burger ice cream sandwich.
If you want to try the sandwich, The Orange County Register has confirmed two locations where you can get it at: 402 South Main Street, Orange, CA 92868 and 1522 E. Katella Avenue, Orange. 92867.