No. McDonald's Big Mac sauce is not spicy. There are onions, pickles, lettuce and salad dressing in it. Onions are not spicy, but slightly sweet. McDonald's is a large multinational chain restaurant in the world. 1955 was founded in Chicago, USA, and has about 30,000 branches around the world. Mainly selling hamburgers, as well as French fries, fried chicken, soft drinks, iced products, salads, fruits and other fast food.