Macaroni and cheese can be found all over Wisconsin. Deep-fried macaroni and cheese is on the menu of at least one restaurant here in town.
But for deep-fried macaroni and cheese on a stick, I think you have to go to the state fair.
I love the state fair.
Quomodocumque 
It’s in Ohio rather than Wisconsin, but I’ve always been impressed by the Mac & Cheese pizza (with potato chips!) that they sell at Danny Boys in Cleveland. They have lots of other crazy pizzas and subs as well: http://www.dannyboyspizza.com/menu-2.php
Mac and cheese pizza is a Madison specialty, too. But I have to concede that we don’t crumble potato chips on top of it here. Click through to that menu, readers, if you dare. (Hint: pierogi pizza!)
Not “the” state fair. A state fair. A state fair in a Big Ten state, most likely. But not necessarily yours.
Wow. Not just deep-fried macaroni and cheese on a stick, but Scotch Egg on a stick. And not just Scotch Egg on a stick, but an entire stand devoted to Scotch Egg-related product. I am humbled by our neighbor to the northwest.