The one I liked was filet americaine in Belgium. Turned out to be raw hamburger with some onions and other stuff on it, spread on a baguette. Then there was sauce americaine as one of the six million things to put on french fries, and that was basically a ketchup/mayo mix.

Muffins have become a big trendy item these days, and they're identified with America because, unsurprisingly enough, they actually are American.

Now if we could just figure out the identification Germans make between doughnuts and Indians...
 

I can confirm that the Doughnut Boy just happens to love curry!

but on a more helpful note:

http://en.wikipedia.org/wiki/Muffins
 

Speaking of ketchup. (Scroll all the way down, since the direct link, again, has no photograph.)
 

Of course there's also German chocolate cake. Oh, and St. Pauli Girl beer! Germans think that one's hilarious.