Wouldn't know. Only been through there once and it had to be a drive-thru state in order to make good time back home.You from Milwaukee??? Isn’t peanut butter on burgers a thing there?
It's certainly not great on every burger, but when paired with sweet toppings it's quite good. In this case the pineapple would replace the crisp dill pickle slices that I traditionally use (fermented pickles are better for burgers, IMHO).