And we’ll have bun, bun, bun

In- N- Out

Debut: 1948

Headquarters: Irvine Locations: 300+ in California, Oregon, Nevada, Arizona, Utah and Texas

The sizzle: Among its burgers is the Double- Double, which has two patties and two slices of cheese. A secret menu offers more exotic fare such as “animal- style” fries and burgers. Packaging carries references to Bible verses.

Umami Burger

Debut: 2009

Headquarters: Los Angeles Locations: 23 in the U. S., with plans to expand to Asia and the Middle East

The sizzle: Its secret menu offers items such as cheesy tater tots. The name comes from umami, which is known as the savory “fifth taste” in addition to salty, sweet, bitter and sour. Umami means “yummy taste” in Japanese.

The Counter

Debut: 2003

Headquarters: Culver City Locations: 35 locations in the U. S., plus six international spots.

The sizzle: The concept is built around customizable hamburgers. Customers use a form to indicate choices that include eight bun and 27 sauce options ( among them: apricot, sweet Sriracha and cabernet mustard).

The Habit Burger Grill

Debut: 1969

Headquarters: Irvine Locations: 140+ in California and eight other states

The sizzle: The chain’s signature is cooking patties over an open f lame. The classic option is the Charburger. It’s another chain with a secret menu. The Habit’s first location was in Goleta, selling burgers for 24 cents each.

Five Guys Burgers and Fries

Debut: 1986

Headquarters: Lorton, Va. Locations: 1,000+ in the U. S. and Canada

The sizzle: Started by Janie and Jerry Murrell, along with their four sons ( a fifth son was born a few years later). The beef is never frozen, and the fries are hand- cut and cooked in peanut oil.

Smashburger

Debut: 2007

Headquarters: Denver Locations: 340+ in California and 34 states, and locations in six other countries

The sizzle: The name describes the chain’s cooking method. The beef used in the burgers starts as meatballs that are then smashed and cooked on a buttered grill.