Libertine Burger were the winners of the Bloggers Choice Award at the National Burger Awards (2019). Check out the recipe from the guys .

Ingredients
How to make The Double #001
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Flank Steak 150 g
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Chuck steak 90 g
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Beef Brisket 60 g
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Gherkin - slices 15 g
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Iceberg lettuce 12 g
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Brioche Bun - seeded 80 g
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American Cheese - slices 60 g
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Tomato ketchup 10 g
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American Yellow Mustard 10 g
Preparation
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How to make The Double #001
- Hold the iceberg lettuce firmly and twist to remove core. Cut into quarters. Wash in cold water and rinse well, use a mandolin to shred the iceberg lettuce.
- Heat the grill to 250˚C.
- Cut the brioche in half and then toast the inside of the bun.
- Squeeze the Ketchup onto the base of the bun, then the mustard.
- Sit the gherkins on top of the sauces.
- Finally add the lettuce to finish the base.
- Take your meats and double grind them.
- The beef mince can then be formed into 2 even sized balls.
- Then either shape into patties or smash onto the grill and press down with the spatula (we smash ours to create a tasty crust!).
- Place your burger patties on the grill, season with the salt and pepper and cook to taste. (we cook for 1m 50s on each side, only flipping once. This creates a tasty crust on the patty).
- After 1m 50s turn your patties over and season once more.
- Add the American cheese (2 slices on each patty).
- Then place a dome over the patties and steam using a little water.
- About 20-30 secs before the burger is cooked, place the top of the brioche on one of the patties, and place the dome over again, add a little more water to soften the bun lid.
- When the time is up sit the patties on top of each other and sit on the pre made base.
- Serve with a side of crispy French fries dusted with sea salt.