
Making ice cream in a blender is the sort of ACME logic that seems like it has to work. Ice cream is just churned milk, blenders spin liquids round pretty quickly; it stands to reason that you could make ice cream in blender, right?
The short answer is that you can make ice cream in a blender but it's very far from perfect. If you attempt to make ice cream in blender you'll end up with something more like a sorbet than an ice cream. Still tasty, but not quite right.