Can you get frostbite in your ears?

Yes. By frostbite in your ears i assume that you mean of the helix and concha the external parts of the ear. It is a common area to develop frostbite if not well protected. Fortunately it is structure with excellent circulation so recovers well. Concern is the potential of exposure of the cartilage and infection. Seek further care.
Frostbite in ears. Yes you can. If you suspect frost bite, call your doctor immediately.