> > Well I think it should be pretty obvious that the most important topping for a cheese burger is... *cheese*. I might be wrong, but I don't think so.
>
> I don't consider the cheese a topping. Cheese might be a topping for a hamburger, maybe, but cheeseburgers have the cheese already included. :-)

There is the possibility of extra cheese. You order a cheeseburger and then ask for four slices of cheese instead of just two. I'd call EXTRA cheese a topping, just like on pizza.

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