An average potato chip is usually composed of around 40 to 50 percent fat, and much of this takes the form of grease. Ultimately, the amount of grease found in potato chips varies significantly depending on how the chip is prepared, with baked chips having less grease than fried varieties.
The most common varieties of potato chip are prepared by being fried in oil in the traditional manner and have about 10 grams of fat in each single ounce serving. Healthy alternatives are often baked in the oven, to prevent adding excess fat or oil, and they typically contain between 6 and 7 grams of fat.
Some varieties of chips contain other additives too, with many combining potato flakes with other ingredients, such as dough or rice flour. Reduced-calorie chips are made this way and they are less greasy, as they are not fried and are not composed entirely of potato.