Quoted from RTS:Does anybody know if passengers can travel through airports with edibles? What are the laws about that?
Will TSA's confiscate, or does it matter if the destination state is legal?
Well, technically the TSA is a federal agency so regardless of whether it's legal in that state or not they're probably "supposed" to confiscate (given that it's still illegal on a federal level.) However, the trend has been continuing that the TSA simply looks the other way. Per the TSA's own website: “TSA security officers do not search for marijuana or other drugs. In the event a substance that appears to be marijuana is observed during security screening, TSA will refer the matter to a law enforcement officer."
If you're traveling with edibles in particular I highly doubt a TSA officer would go out of their way to identify an edible as having marijuana in it. Pretty safe.