It's by Dairy Queen.
It's vanilla ice cream mixed with a generous dapple of Nutella, the famous hazelnut chocolate spread, and your mix-in of choice. This new Blizzard has two variants: Banana Nutella and Waffle Crisp Nutellla.
Is it good? Well, it's O-K. The vanilla flavor is too strong; it overpowers the hazelnut-chocolate component. Although the two variants are good, we like the Banana Nutella more. The ripe-fruit taste complements the sweetness of the ice cream. The crispy waffle bits add a nice layer of texture, but taste-wise, it's almost negligible.
Try the Nutella Blizzard and judge for yourself.