The name comes from a 1975 advertising campaign featuring a list of the Big Mac's ingredients: 'Two all beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame seed bun.' The precise recipe for what McDonald's itself now calls Big Mac Sauce remains a secret, but it is recognized as a variant of Thousand Island dressing. Available for a limited time in some countries.

Both versions dropped one patty and replaced it with the respective ingredient. In Japan, there was a variant with egg, called the Mega Tamago, as well as a variant with tomato (called the Mega Tomato).In Israel, where religious Jews do not mix dairy and meat products, a special Kosher version of the Big Mac is served without cheese.Served by some stores in the United States under the moniker 'Mac Jr'. It sold as a Baby Mac in New Zealand, Was sold in Australia, now discontinued. Son of Mac - Also known as the Mini Mac or Baby Mac, a version with only one patty and no center roll piece.In India, where Hindus do not eat beef, the Big Mac was renamed the Maharaja Mac and was originally made with lamb instead of beef however, along with the company's other items it is now made from chicken.Also known as the Bigger Big Mac as an LTO product to celebrate the 2006 FIFA World Cup.Named after Mount McKinley in Alaska, and is only on the menu in that state. The McKinley Mac - made with two quarter pound patties.Monster Mac - eight 1.6 oz (45.4 g) beef patties and extra cheese.Discontinued in the United Kingdom, limited availability in the United States and Canada (where it is commonly marketed under the name Double Big Mac). Available in Australia, China, Ireland, Serbia, Japan, Turkey, Malaysia, New Zealand and Thailand (Double Big Mac). The Mega Mac or Double Big Mac - four 1.7 oz (47.5 g) Beef patties and an extra slice of cheese.The Big Mac is a hamburger consisting of two 1.6 oz (45.4 g) beef patties, Iceberg lettuce, American cheese, pickles, chopped onions and special Mac Sauce (a Thousand Island dressing variant, though the recipe remains a secret) served on a three part sesame seed bun.

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