How to design a generic icon symbolizing a brand (McDonalds, Apple, etc..)?

How would a generic brand-icon look? The icon will be used in a web application that has "Brand" as an object, and the "Brand" could be "McDonalds", "Apple", "BMW" or any other company/brand.

Right now we use a simple star as a brand icon, but we are not quite happy with this.

Any suggestions?