Photo: BJ's Restaurant & Brewhouse. Design: Eat This, Not That!The cookie skillet is a mash-up of two of America's most classic and popular desserts. It starts with an oversized cookie–of any variety, but chocolate chip is one of the most common choices–typically baked in a cast-iron skillet. Once it's out of the oven, the big warm cookie is then topped with a generous scoop or two of ice cream. Any flavor will do, but more often than not, it's vanilla. Chocolate syrup or other garnishes may get