Make the secret sauce by combining all of the ingredients in a medium bowl and mix them well until evenly combined. Season with Kosher salt to taste. Set aside.
Divide the beef into 8 equal parts and roll them into meatballs. Set aside.
Heat your skillet or a flat top to medium high heat.
Lightly oil the skillet or flat top and add the burgers. Season with your Salt and Pepper + Three Chiles. Once juices start to pool at the bottom of the burger flip the burgers and cook for a couple more minutes. Once the juices start to pool again use a smash burger press or large metal spatula to smash the burger until it is SUPER THIN! Add your sliced onions. Flip the burgers and add your American cheese to each burger. Cook for 1 more minute to let the cheese melt. Remove from the heat and set aside.
In the same skillet or flat top, add your buns to toast them for a couple minutes. Remove the buns from the heat and set aside.
Begin building your burgers by starting with a bottom bun, followed by 2 burger patties with cheese and onions for each burger, then add a TON of pickles (a normal amount is fine too) and smear the top bun with your secret sauce and close your burgers. Enjoy!