Carl’s Jr. and Hardee’s

Fiery Famous Star: In January the sister chains introduced this item, that was available through March, of a charbroiled beef patty with Fiery Sauce (an habanero-ranch sauce), pepper Jack cheese, jalapeño pepper, onions, tomato and lettuce on a toasted seeded bun, starting at $4.39 for a single and $6.39 for a double

Slater’s 50/50

Pizza Burgers: This chain, whose claim to fame is burgers made with 50% ground beef and 50% bacon, swapped out the bacon for mild Italian sausage for these three burgers which were offered in February. They’re all topped with red pepper-garlic marinara and fried mozzarella cheese, plus a choice of pepperoni, Hawaiian (grilled pineapple and Canadian bacon) or supreme (black olives, green pepper slices, pepperoni and sauteed mushrooms), $14.99

Burger King

Sourdough King: From late February through mid-April, the quick-service burger chain offered this item of a quarter-pound beef patty topped with thick-cut bacon, melted American cheese, ketchup and mayonnaise on toasted sourdough bread, price varied by location

Hurricane Grill & Wings

Cheesy Quesadilla Burger: This burger-quesadilla hybrid, available from March through early June, was made of a half-pound hamburger and Monterey pepper Jack cheese between two quesadillas, served with tortilla chips and queso for dipping, $12.99

Bad Daddy’s Burger Bar

Fried Mozzarella Burger: This returning favorite made with fried fresh mozzarella, tomato jam, leaf lettuce, garlic mayonnaise, red onion and Dijon mustard over a beef patty on a bun for $11.45 was available in March

BurgerFi

The SWAG Burger: Introduced in mid-March as a limited-time offer, this “spicy wagyu burger” proved so popular that it was made a permanent item. It’s made with two burger patties comprised of a beef blend that includes American wagyu brisket topped with charred jalapeño peppers, candied ghost pepper bacon, sweet tomato relish, habanero pepper Jack cheese and spicy steak sauce, around $10.65

Friendly’s

The family-dining chain kicked off spring with this lineup, which was available through early June.

Heinz 57 Burger: Beef patty topped with Swiss cheese, lettuce, tomato, mayonnaise, fried onions and Heinz 57 steak sauce on a bun, $10.99-$11.69

Vermonter Burger: Beef patty topped with sharp white cheddar cheese, maple pepper bacon, lettuce tomato and mayonnaise on a ciabatta roll,, $10.99-$11.69 

Hot Honey SuperMelt: Fried chicken tenders glazed in hot honey topped with cheddar cheese, pickle chips and coleslaw on sourdough toast, $9.99-$11.29

Maple Pepper Bacon SuperMelt: Maple pepper bacon over roasted turkey breast with sharp white cheddar cheese and honey mustard on sourdough toast, $9.99-$11.29

Logan’s Roadhouse

Bayside Burger: This springtime-surf-and-turf item was comprised of a ½-pound burger topped with spiced popcorn shrimp, fried onions and creamy Cajun sauce with choice of side, $10.99

Buffalo Wild Wings

Bacon Smashed Hatch Chile Burger: This item of two smashed and seared burger patties with some bacon pieces mixed in topped with American cheese, Hatch chiles, grilled onions, pickled Fresno chiles and Hatch chile aïoli was introduced in March for around $12.99

Firebirds Wood Fired Grill

Ham-Jam Burger: This item tapped into the bacon jam trend and was available in March and April. It was a grilled beef patty topped with pepper Jack and sharp cheddar cheesed, griddled ham, bacon jam and a fried egg on a toasted brioche bun, served with choice of side, $15.95

Roy Rogers

Big Sky Burger: This quarter-pound burger topped with Smithfield pulled pork, beer battered onion rings and Duke’s Georgia Sweet Heat barbecue sauce served on a corn-dusted Kaiser roll was available from early April through early June for around $5.99

Shake Shack

Avocado Bacon Burger: The fast-casual burger chain offered avocado as a limited-time offering from April through June, as well as this cheeseburger topped with sliced avocado, Niman Ranch applewood-smoked bacon and Shack Sauce, starting at $7.89

IHOP

Steakhouse Premium Bacon Burger: This was part of a springtime promotion of

Steakhouse Premium Bacon — a thick-cut pork belly cooked in sous-vide and treated with hickory smoke and a bourbon glaze over a burger with American cheese, lettuce, tomato, red onion, pickles and signature IHOP sauce with a side of fries, onion rings or two buttermilk pancakes, around $10.99

Umami Burger

NERVO Pickle Burger: This springtime item came in a box with a QR code linking to a video of Pickle, a new single by twin sister DJ duo NERVO. It was made with a burger patty, provolone cheese, fried pickles and a custom-made jalapeño pickle ranch sauce on a brioche bun, $11.50

Red Robin Gourmet Burgers and Brews

Bacon Jammin’ Burger: Available from April through mid-summer, this burger was topped with bacon jam, bacon strips, bacon aïoli, cheddar cheese, red onions, lettuce and tomatoes on a sesame-seed bun, around $12

Wendy’s

Bourbon Bacon Cheeseburger: This permanent item on Wendy’s Made to Crave menu was introduced in May and is topped with bacon, American cheese, bourbon bacon sauce and crunchy fried onions on a toasted bun, around $5.39

Dog Haus

Big Kahuna: This burger, available from June through August, was part of Dog Haus’s series of collaborations with other chefs — in this case King’s Hawaiian executive chef Bert S. Agor Jr. It was an Angus beef patty topped with American cheese, bacon, miso ranch sauce, arugula, pickled jalapeño and green peppers, scallions, onion rings and spicy “bang bang sauce” on grilled King’s Hawaiian rolls, around $11.99 of which $1 went to hunger relief organization No Kid Hungry

Elevation Burger

King’s Hawaiian Grilled Pineapple Burger: This summertime item that was available through Labor Day was made with two grass-fed beef patties on a King’s Hawaiian bun topped with cheddar cheese, sweet chile sauce, lettuce, tomato, mayonnaise and two grilled Dole pineapple rings, price varied by location; a similar build was also available at sister chain Fatburger

Woody’s Bar-B-Q

These three hunting-themed items were available in June and July.

The Barrel: Half-pound Black Angus beef patty topped with melted blue cheese, lettuce, tomato, red onion, ketchup and mayonnaise on a toasted bun, around $11.99

The Muzzle: Half-pound Black Angus beef patty topped with sauteed mushrooms and onions, Swiss cheese, lettuce and tomato on a bun with garlic butter and horseradish sauce, around $11.99

The Hammer: Half-pound Black Angus beef patty topped with mac & cheese, lettuce, tomato and onion straws on a bun, around $11.99

El Torito

El Torito Bacon Burger: Available through summer, this burger is made with a seasoned beef patty, bacon, pasilla chiles, guacamole, Jack cheese,, pickled red onions, chipotle aïoli and barbecue sauce, served with fried potatoes and red pepper dip, $14

Whataburger

Pico de Gallo Burger: This returning item was brought back in June for an unspecified limited time. It’s made with two beef patties on a 5-inch bun topped with two slices of pepper Jack cheese, pico de gallo and cilantro lime sauce, around $9

Availability: An unspecified limited time

Bennigan’s

Mahal-O’Burger: Available through July, this returning item is a half-pound burger patty with pepper Jack cheese, Sriracha aïoli, a cinnamon sugar-glazed grilled pineapple ring and pineapple sweet chile sauce, around $14-$15

Availability: Through Aug. 3

Taziki’s Mediterranean Café

Taziki’s Lamb Burger: The fast-casual Greek chain tested this item in Nashville; Panama City, Fla.; Birmingham, Ala.; and Little Rock and Northwest Arkansas. It’s two patties of seasoned ground lamb topped with peppers, onions, feta cheese and Taziki sauce on a grilled Kaiser bun, served with chips and choice of a side, $10.99-$11.99