This is a touchy subject, because all cheese fries are technically the best cheese fries. But some places, like Shake Shack, go above and beyond. A smart cheese-fry slinger opts for a cheese sauce that coats the fry more evenly and doesn't congeal into a cold, flavorless epoxy. At Shake Shack, the fries are amped up to gold-star gourmet status by infusing a cream base with sautéed onions and jalapeños for a deeper, more organic flavor. That mixture is then strained over equal parts grated American cheese and cheddar for a smooth, golden, creamy finish.