This is an entry in our Disneyland 101 Glossary: Disneyland Resort definitions in under 101 words, from Mouse Brief.
“Mickey Bar” is a nickname for a guest favorite treat at Disneyland Resort: Nestle Mickey’s Premium Ice Cream Bar. This is vanilla ice cream mounted on a popsicle stick and covered in a chocolate shell. The unique shape of this treat gives it a special Disney touch: it is in the form of the familiar three-circle outline of Mickey Mouse’s head. These bars can be ordered at many snack carts, as they are pre-made and ready for grab-and-go. This snack has so many fans that you may also see its likeness recreated on merchandise.