As Lynne stated, it is a cart on the Boardwalk located near the ice cream place. Actually, the corndogs are really yummy there! It has corndogs, hot dogs, sausages, etc.
There is also a coffee cart located near the gift shop. Oh, and don't forget the funnel cake stand!!!
Also, just FYI, there are three restaurants located in the Boardwalk: Big River Grille, Spoodles, and the ESPN club. Also, you can get counter service from the bakery.