Jul 19, McDonald's fries are a big part of the reason why most of us head to the Golden Arches. And now, the fast-food giant is making their signature. Jul 19, McDonald's is testing Loaded Bacon & Cheese Basket of Fries in the McDonald's classic fries are topped with cheddar cheese sauce and. Loaded French Fries. Ingredients. Potatoes, Salt and Vegetable Oil, with various chili, pepper, bacon/cheese, or gravy toppings, depending on what's offered in.