In-N-Out Double Double Animal Style Smash Burger

Directions

1. Prepare the special sauce: In a mixing bowl, combine 2 tbsp yellow mustard, 1/4 cup Duke's mayo, 2 tbsp ketchup, 1 tbsp dill relish, 1 tbsp sweet relish, and 2 tbsp white wine vinegar. Mix well and set aside.

2. Preheat one zone of your Blackstone griddle to high heat. High temperature is crucial for achieving the desired crust on the smash burger. Also, heat another zone to medium-medium low.

3. While the griddle is heating, add a little olive oil to the medium zone and begin cooking your diced yellow onions. Season with salt and pepper, stirring occasionally until the onions are caramelized and softened with some color. Once done, turn off the heat and leave the onions on the griddle.

4. Loosely form the ground beef into 3-4oz balls. It's important to pack them loosely to allow for proper smashing. With 1 lb of beef, you should get approximately 6 beef balls.

5. Once the griddle is hot, place the beef balls on it and immediately smash them down using parchment paper and a spatula. Press down firmly for about 10 seconds to initiate searing on the patties. When one side has developed a good crust, flip the patties. As you flip, squirt a little mustard onto the patties and let them cook briefly in the mustard. Add a slice of American cheese to each patty and stack them to form double patties.

6. Optionally, toast the buns at this point.

7. Assemble the burgers: On the bottom bun, spread the special sauce, then layer with lettuce, sliced tomato (seasoned with salt and pepper), pickles, the double beef patties, caramelized onions, a little more sauce, and finally, the top bun. Enjoy your burger!