Let's make the sauce first! In a small bowl, whisk together all the sauce ingredients. Pretend you're conducting a tiny orchestra, and aim for a symphony of flavors. Cover this masterpiece and chill it in the fridge for at least an hour.
Crank up the heat on your griddle or cast-iron skillet to medium. If you're using a griddle, shoot for around 450°F.
Divide your ground beef into 6 equal portions. Eyeballing it is totally fine, but if you're feeling precise, use a ⅓ cup measuring cup and pack it loosely. Gently roll the beef into balls, like you're making mini meatballs for the burger gods.
Place a burger ball on the hot griddle or skillet, then top it with a tortilla. Now, grab your burger press or a sturdy spatula and press down firmly until your burger is nice and flat. Cook for about 3-4 minutes on the first side.
Flip it and season it! Carefully loosen the burger from the griddle or skillet with a spatula and then flip it over. Immediately sprinkle some salt and pepper on top, or your favorite burger seasoning if you're feeling fancy. Then, add a slice of melty American cheese.
Cover the burger for about 1-2 minutes, letting the cheese get all melty and gooey.
Repeat steps 4-6 for the rest of your burger balls.
Pile each cooked taco with lettuce, onion, 2-3 pickle slices, and a generous drizzle of that delicious, kickin' sauce you made.
Devour! These tacos are best enjoyed warm, so grab a plate and dig in.