Dill pickle
Pickles are in 31 recipes and are structurally necessary rather than optional. A burger is fat, salt and protein with very little acid, and without something sour the whole thing flattens out after a few bites. Dill pickles supply that acid plus a crunch that survives the heat. Sliced thin and laid flat they distribute; whole spears slide out. Patting them dry before assembly matters more than it sounds — pickle brine on a bun face undoes the toasting in seconds.
Often goes with
Recipes with dill pickle

TOP 2
McDonald's Quarter Pounder with Cheese (Copycat)

Big Mac Taco

Big Mac Hot Dog

Green Chile Cheeseburger

Croissant Big Mac

McDonald's Big Mac (Copycat)

Baguette Big Mac

McDonald's Quarter Pounder with Cheese Deluxe (Copycat)

Zachariah's Shack Burger

The Heisenberg Burger

Whopper (Copycat)

KFC Classic Chicken Sandwich (Copycat)

KFC Spicy Chicken Sandwich (Copycat)

McDonald's McFeast (Copycat)

KFC Smoky Mountain BBQ Sandwich (Copycat)

McDonald's Deluxe McCrispy (Copycat)

Fat Mimolette Bacon & Fried Onion Burger

Bologna Sliders with Fried Onions

McDonald's Cheeseburger (Copycat)

Burger Sliders

McDonald's McRib (Copycat)

Juicy Lucy Cheddar Burgers

Cuban-Style Sliders

McDonald's Bacon McDouble (Copycat)

Pickle Crustburger

Cheesy Bacon Ranch Burger Sliders

Sloppy Smash Supreme

McDonald's Hamburger (Copycat)

Burger King Impossible Whopper (Copycat)

ABQ Hot Chicken Sandwich

McDonald's McPlant (Copycat)