Classic Double Smash Cheeseburger

Prepare the sauce by mixing 45 gr Mayonnaise, 15 gr Ketchup, ¹/₂ tbsp Mustard, 1 tablespoon of finely chopped 100 gr Pickled Cucumber, and a pinch of 1 tsp Black Pepper - Powder in a small bowl. Set aside. Take the cold 500 gr Minced meat mixture and divide it into 4 equal portions of about 125 gram each. Place each portion between two sheets of parchment paper and press firmly with your palm, a plate, or the bottom of a small pot to form very thin discs, about 0.5-0.8 cm thick and slightly wider than the bun. Make a slight indentation in the center of each patty with your finger. Thinly slice the remaining 100 gr Pickled Cucumber and 50 gr Spring Onion for assembly.

Cut the 1 ³/₄ pieces Hamburger Buns in half. Heat a dry pan or a pan with a small amount of 2 tsp Butter over medium-high heat. Toast the cut sides of the buns for 30-60 seconds until golden brown. Set the toasted buns aside.

Heat a heavy-bottomed frying pan (preferably cast iron) over very high heat. Add just ¹/₂ tbsp Sunflower oil, being careful not to add too much as the meat mixture will release its own fat.

Season one side of two patties with 1 tsp Table salt and 1 tsp Black Pepper - Powder. Place them in the hot pan with the seasoned side down. Immediately season the top side of the patties. Cook for 1.5-2 minutes on the first side.

Flip the patties. Immediately place one slice of 4 pieces Cheddar Cheese - Slices on top of each patty. Cook for another 1-1.5 minutes. If the cheese isn't melting well, add 5 ml Water to an empty part of the pan and quickly cover for 20-30 seconds to create steam. Remove the cooked patties and repeat the process for the remaining two patties.

Assemble each double cheeseburger: Start with the bottom half of a toasted 1 ³/₄ pieces Hamburger Buns. Spread a generous amount of the prepared sauce. Layer with slices of 100 gr Pickled Cucumber. Place the first cheesy patty, followed by the second cheesy patty. Top with thin slices of 50 gr Spring Onion, a little more sauce, and finally the top half of the 1 ³/₄ pieces Hamburger Buns.