The Beyond Meat Burger: 6-ounce vegetarian pea protein-based patty topped with white cheddar, lettuce, tomato, red onion, pickles and Friday’s sauce, price varies by location

Availability: Permanent

Mushroom Swiss Burger: Two beef patties topped with mushrooms, Swiss cheese and creamy au jus sauce, price varies by market

Availability: An unspecified limited time

Double Quarter Pound King Sandwich: Two quarter-pound beef patties, American cheese, onions, pickles and ketchup on a sesame seed bun, $5.39 recommended price

Availability: Permanent

The Impossible Burger: 4-ounce patty of Impossible Burger vegan meat substitute, smoked cheddar cheese, lettuce, caramelized onions, chile spiced tomatoes and signature, Wahlsauce, $12.95, may vary by market

Availability: Permanent

Falafel Burger: Falafel, hummus, pickles, cheddar cheese grilled onions and tomatoes on a bun, served with feta fries (fries with crumbled feta, sea salt and Greek vinaigrette), $8

Availability: Until March 1

Impossible Burger: Meatless burger manufactured with wheat protein, potato protein, coconut oil, heme protein and other ingredients served on a bun with lettuce, tomato, mustard, onion, pickle relish and mayonnaise, $8-$10 depending on location

Availability: Permanent

Smoky Mushroom Bacon Cheeseburger: A beef patty topped with portobello mushrooms, melted Asiago cheese, applewood smoked bacon and fried onions, 4.99 may vary by location

Availability: An unspecified limited time

Indulgent BBQ burger: Two Certified Angus Beef patties, two slices of melted pepper Jack cheese, Applewood smoked bacon, fried onion strings, barbecue sauce and mayonnaise on a bun, $8.99

Availability: Through May 27

Cowboy Ranch Tavern Double: Two beef patties, bourbon-infused Whiskey River BBQ Sauce, ranch dressing, fried onion straws, American cheese and lettuce on a sesame seed bun, $6.99

Grand Brie Finest Burger: Half-pound Black Angus patty with melted Brie cheese, balsamic fig jam, bacon, arugula and mayonnaise on a brioche bun, $14.29

Availability: Through June 24

Sourdough King: Two quarter-pound beef patties, melted American cheese, bacon, onions and signature sauce on a sourdough bun, $5.99 recommended price

Availability: Permanent

Double Bistro Stack Burger: Two beef patties with melted Swiss cheese, bistro sauce, grilled onions, fried onion tangles and Parmesan on a glazed bun, $2.49

Availability: Through May 13

Pretzel Haus Pub Burger: Two burger patties, pickled red onions, two slices of bacon, Wisconsin cheddar and Wisconsin cheddar cheese sauce and “bistro sauce” — mayonnaise with horseradish and mustard — $5.99

Availability: April 2-May 27, or while supplies last

Blaster Fire Burger: A beef patty topped with chipotle Gouda cheese, bacon and ghost pepper sauce with lettuce, tomato, red onions and a pickle on a brioche bun, served with potato tots that look like meteors, starting at $9.39

Availability: Through June 26, in conjunction with LucasFilm’s “Solo: A Star Wars Story”

Guacamole Crunch Charburger: Beef patty topped with a fried tostada shell, guacamole, pico de gallo, melted cheese and ancho chile lime sauce, $4.99

Availability: Through May 29

French Dip Burger: A new blend of Certified Angus Beef and prime rib topped with provolone, fried onion strings, Parmesan Horseradish crème and au jus, $15.75

Availability: Permanent

Veggie Shack: A patty of black beans, brown rice and roasted beets topped with provolone cheese, lettuce, tomato, onions, pickles and a vegan mustard-mayonnaise blend, $7.29

Availability: Permanent

Brew Burger: A monthly rotating burger featuring an ingredient made with a local craft beer, $8.50

Breakfast Burger (pictured): A patty of ground sausage, ham and beef topped with an egg, applewood-smoked bacon, American cheese, potato hay and herb mayonnaise, $8

Availability: Permanent

Mac & Cheese Burger: Two seasoned quarter-pound Angus beef patties, fried onion petals, bacon, smoke-flavored aioli, lettuce, tomato, pickles, American cheese and mac & cheese on a lightly toasted bun, $10.99

ECW&G Burger: Two seasoned beef patties, melted pepper Jack cheese, ranch, wing sauce, lettuce and tomato on a lightly toasted bun, $10.99

The Dallas Burger: Two seasoned beef patties, pickles, coleslaw, cowboy sauce, lettuce and tomato on a lightly toasted bun, $10.99

The 50/50 Burger: Two patties made with half beef and half bacon and aged cheddar cheese, topped with bourbon ketchup, lettuce and tomato on a lightly toasted bun, $10.99

Availability: Permanent

Vegan Burger Melt: A patty made of quinoa, beet, black bean and brown rice with tomato-cayenne vegan cheese substitute, roasted tomatoes, caramelized onions and arugula on a multigrain roll, $8.95

Availability: Until June 30

A Bigga Burger: A pound of chopped, seasoned burger meat topped with melted white American cheese, Chipotle BBQ Arizona Ranch, grilled onions, lettuce, tomato and pickles on a hoagie bun, $12.99 with choice of side, may vary by location

Availability: Through fall

Impossible Burger: Vegan hamburger substitute based on wheat protein, grilled and served on a brioche bun with cheddar, “special sauce,” lettuce and tomato, $11.50 with French fries

Availability: Permanent

El Diablo Thickburger: A burger patty topped with jalapeño poppers, bacon, sliced jalapeños pepper Jack cheese and habanero bacon ranch sauce on a premium bun, recommended price $4.99

Availability: At most locations through Sept. 2

The family dining chain based in Glendale, Calif., has relaunched its burgers, with upgraded beef, new builds and a new cooking process at its roughly 1,750 locations.

Details here.

Availability: Permanent, but at a promotional price of $6.99 with unlimited fries and a drink for an unspecified limited time

Bacon Smokehouse Burger: Quarter-pound patty topped with Applewood smoked bacon, a sweet and smoky bacon onion sauce, fried onion strings, white cheddar cheese and a mild sweet mustard sauce, also available as a fried or grilled chicken sandwich, around $5 depending on location

Availability: Permanent starting in July

American Brewhouse King: Two burger patties, three half-strips of bacon, fried onions, proprietary “tavern sauce,” American cheese and mayonnaise on a sesame seed bun, $6.19 recommended price

Availability: An unspecified limited time

Meatless Miso Burger: Miso glazed Beyond Meat burger, watermelon radish, pickled ginger, arugula and wasabi sour cream, $12.99

Availability: Permanent

BBQ Pulled Pork Burger: A cheeseburger topped with Niman Ranch barbecue pulled pork, jalapeño slaw and pickles, $7.59

Availability: At select locations in New York and New Jersey through summer

The Umami Frenchie: Developed with New York-based chief Daniel Boulud, beef patty with caramelized onions, tomato compote, crispy braised pork belly, Dijon mustard, tomatoes, Raclette cheese, arugula and a black-pepper bun garnished with a French flag, $18

Availability: Through Sept. 14

America’s Diner Cheeseburger: Beef patty, caramelized onions, American cheese and new All-American sauce (creamy and tangy with hints of tomato) on a brioche bun, served with fries, hash browns or seasonal fruit, starting at $6.99

Availability: Permanent

Blazin’ Bear Burger: Seven-ounce beef patty with coleslaw, mayonnaise, pepper Jack cheese, tomatoes, dill pickle chips and Papa Burn hot sauce on a cornmeal dusted Kaiser bun, $8.99 with fries

Fajita Burger: Seven-ounce beef patty with avocado bacon ranch aïoli, pepper Jack cheese, fried tortilla strips, lettuce and grilled peppers and onions on a cornmeal dusted Kaiser bun, $8.99 with fries

Steakhouse Burger: Beef patty with horseradish aïoli, blue cheese crumbles and grilled mushrooms and onions on a cornmeal dusted Kaiser bun, $8.99 with fries

Availability: Through Sept. 5

Miz Grazi Burger: One-third pound grilled Black Angus beef burger topped with “bold and mildly spicy” Miz Grazi sauce, cheddar cheese, lettuce, tomato, onions, pickles, mayonnaise, mustard and ketchup, starting at $3.99

Availability: Through Sept. 30

The burger giant is testing items offered abroad at select locations in Florida, and chicken sandwiches are being tested in Washington state. Details here.

Availability: An unspecified limited time

Double Pretzel Haus Pub Burger: A burger topped with cheddar cheese, cheddar cheese sauce, bacon, pickled onions and mustard sauce on a pretzel roll, recommended price $5.99

Availability: Through Nov. 18

The Oktoberfest: Grilled burger topped with ham and melted Swiss cheese on a pretzel bun with beer mustard, caramelized onions and shredded romaine, $11.49, may vary by location

Availability: Through Oct. 31

A.1. Thick & Hearty Burger: Two beef patties, grilled onions, bacon and melted American cheese topped with A.1. Thick & Hearty Sauce, price varies by market

Availability: An unspecified limited time

Green Chile Burger: Ground beef topped with green chiles, green chile purée, pepper Jack cheese, bacon and caramelized onions on choice of bun, $7.99

Availability: Through early Jan. 2019

Pastrami Thickburger: Third-pound burger topped with smoked pastrami, mustard, red onion, lettuce, tomato and pickle on a premium bun, $5.29

Availability: Through October

Bacontastic Burger: Beef patty topped with two strips of bacon, additional bacon pieces, melted cheddar and American cheeses and Thousand Island dressing on a toasted bun, $2

Availability: Oct. 15-Nov. 25

Ribeye Burger: Seasoned rib eye patty with mayonnaise, spring lettuce mix, two tomato slices and a slice of provolone cheese on a potato roll bun, $5.50-$6.50 depending on market

Blue Cheese & Bacon Ribeye Burger: Seasoned rib eye patty with blue cheese sauce, four half slices of bacon, blue cheese crumbles and grilled onions on a potato roll bun, $5.50-$6.50

Availability: Through Dec. 1

The Master Cheese: Black Angus burger with melted extra-sharp cheddar and provolone cheese, Bistro Sauce, dill pickle, shredded romaine and tomatoes on a toasted brioche bun with unlimited fries, $13.29

Haystack Tavern Double Burger: Grilled burger with American cheese, barbecue sauce and onion straws on a bun with unlimited fries, $6.99

Availability: Through Jan. 5, 2019

Thanksgiving Burger: Turkey patty topped with brioche stuffing, turkey gravy, cranberry sauce and garlic-sage aïoli on a honey wheat bun, $13.99

Availability: Nov. 1-30

Philly Cheese King: Two burger patties, two slices of American cheese and caramelized onions on a bun, $5.99

Availability: An unspecified limited time at participating locations

KPOP Burger: Two griddle-smashed wagyu beef patties in kalbi glaze, topped with white American cheese and Thousand Island dressing, served on a grilled King’s Hawaiian bun, developed in partnership with Seoul Sausage Co. founder Chris Oh, $6.99

Availability: Through December

Bistro Turkey Slider: Ground turkey breast patty topped with tangy sauce on a slider bun, starting at 99 cents

Cheddar Apple Turkey Slider: Ground turkey breast patty topped with smoky cheddar cheese and cinnamon apple butter, starting at 99 cents.

Availability: Through Jan. 3, 2019, or while supplies last

(Pictured with sweet potato fries that were offered along with it.)

Impossible Burger: Impossible Food’s vegan hamburger substitute with pickles, lettuce, tomato, onion, white American cheese and proprietary 1001 Island sauce on grilled King’s Hawaiian rolls, $6.99

Impossible Slider: Miniature Impossible Burger patty with mayonnaise, white American cheese and caramelized onions on a grilled King’s Hawaiian Roll, $2.99

Availability: Permanent

Impossible Burger: A patty of Impossible Foods’ vegan burger substitute with tomato, lettuce, pickles, onions, mayonnaise and ketchup, $9.99 with fries

Availability: Permanent

Sourdough Steak Melt: Seasoned beef patty topped with American cheese, Philly steak, grilled onions, cheddar cheese, sauce and au jus Montreal mayonnaise on toasted sourdough, $2

Sourdough All American Double: Two seasoned beef patties topped with melted American cheese, grilled onions, cheddar cheese sauce and au jus Montreal mayonnaise on toasted sourdough, $2

Availability: Through Jan. 6, 2019

Fritos Chili Cheese Jr. Burger: Beef patty topped with Fritos, chili and cheddar on a soft bun, starting at $1.99

Steakhouse Bacon Cheeseburger: Quarter pound beef patty topped with cheese, bacon, grilled onions and smoky black pepper mayonnaise on a brioche bun, $4.99 with an order of medium potato tots

Availability: Through Dec. 30