McFlurry consists of whipped, soft-serve McDonald's vanilla-flavored frozen dairy product in a cup. The McFlurry has a specially designed spoon with a hole in the handle which is attached to a blender. Sprinkles or various types of candy are added to the cup, which are then blended using the spoon.
The ice cream product in a McFlurry is the same product McDonald's uses for its cones and sundaes. The ice cream product is made from UHT milk, extended with methylcellulose. Flavors vary from market to market, and new flavors are introduced regularly.
Prior to September 2006, McFlurry container lids were of a size that caused some animals to become trapped with their heads inside the container. A small outcry, particularly to protect hedgehogs and skunks, caused a redesign in the container shape. After "significant research and design testing," the size of the opening was reduced to prevent entry of these animals.