Which foods are unique to the United States?

I am going on a foreign exchange soon (I leave in about 2 months). I will be going to Norway, and I wanted to take some food stuffs along with me that are unique to the United States. Although I am having a tough time coming up with many. On the list so far I have: Spam (Haha), and Hershey's bars. Does anyone know of anything else I could possibly take?