All Natural We kettle cook in a cholesterol free peanut oil blend for a crunchier, tastier potato chip! Dirty Potato Chips are: all natural; cholesterol free; kettle cooked in a peanut oil blend; kosher certified; and contain: no MSG, no artificial colors, no artificial flavors, no preservatives, no wheat glutens, no hydrogenated fats, no trans fats, no artificial sweeteners. At Dirty's we don't wash out the natural potato flavor, which makes our chips crunchier and tastier.