But trust us, it is absolutely essential to the Taco Salad. Iceberg is necessary because structurally, it can hold up to the variety of topping that will be put on top of it — which can be both hot and cold. A more delicate salad would wilt in the presence of hot ingredients. Limp salad is both difficult to eat, and adds nothing to the taco salad, texturally. The joy of a taco salad comes from the variety of flavors and textures that it brings together.