The Arch Deluxe was a signature hamburger

Hamburger

A hamburger is a sandwich consisting of a cooked patty of ground meat usually placed inside a sliced bread roll...

 sold by McDonald's in 1996 and marketed specifically to adults. It was soon discontinued after failing to become popular despite a massive marketing campaign and now is considered one of the most expensive flops of all time.
The Arch Deluxe was a quarter pound of beef

Beef

Beef is the culinary name for meat from bovines, especially domestic cattle. Beef can be harvested from cows, bulls, heifers or steers. It is one of the principal meats used in the cuisine of the Middle East , Australia, Argentina, Brazil, Europe and the United States, and is also important in...

, on a split-top potato flour sesame seed bun topped with a circular piece of peppered bacon

Bacon

Bacon is a cured meat prepared from a pig. It is first cured using large quantities of salt, either in a brine or in a dry packing; the result is fresh bacon . Fresh bacon may then be further dried for weeks or months in cold air, boiled, or smoked. Fresh and dried bacon must be cooked before eating...

, leaf lettuce

Lettuce

Lettuce is a temperate annual or biennial plant of the daisy family Asteraceae. It is most often grown as a leaf vegetable. It is eaten either raw, notably in salads, sandwiches, hamburgers, tacos, and many other dishes, or cooked, as in Chinese cuisine in which the stem becomes just as important...

, tomato

Tomato

The word "tomato" may refer to the plant or the edible, typically red, fruit which it bears. Originating in South America, the tomato was spread around the world following the Spanish colonization of the Americas, and its many varieties are now widely grown, often in greenhouses in cooler...

, American cheese

American cheese

American cheese is a processed cheese. It is orange, yellow, or white in color and mild in flavor, with a medium-firm consistency, and melts easily. American cheese was originally only white, but is usually now modified to yellow. In the past it was made from a blend of cheeses, most often Colby...

, onion

Onion

The onion , also known as the bulb onion, common onion and garden onion, is the most widely cultivated species of the genus Allium. The genus Allium also contains a number of other species variously referred to as onions and cultivated for food, such as the Japanese bunching onion The onion...

s, ketchup

Ketchup

Ketchup is a sweet-and-tangy condiment typically made from tomatoes, vinegar, sugar or high-fructose corn syrup and an assortment of...

, and a "secret" mustard

Mustard (condiment)

Mustard is a condiment made from the seeds of a mustard plant...

 and mayonnaise

Mayonnaise

Mayonnaise, , often abbreviated as mayo, is a sauce. It is a stable emulsion of oil, egg yolk and either vinegar or lemon juice, with many options for embellishment with other herbs and spices. Lecithin in the egg yolk is the emulsifier. Mayonnaise varies in color but is often white, cream, or pale...

 sauce.

• Despite failing nearly a decade prior in North America, McDonald's Japan introduced in 2003 a nearly identical sandwich (without the peppered bacon) called the Tomato McGrand.