Instructions:
Preheat your oven to 350°F (175°C). Line a sheet pan with parchment paper or lightly grease it.
In a mixing bowl, combine the ground beef, salt, black pepper, garlic powder, and onion powder. Mix well until the seasonings are evenly incorporated.
Press the seasoned ground beef mixture into an even layer on the prepared sheet pan, making sure it reaches the edges.
Bake the beef in the preheated oven for 15-20 minutes, or until fully cooked. Remove from the oven and let it cool slightly.
While the beef is cooling, prepare the special sauce by combining all the sauce ingredients in a bowl. Mix until well combined.
Once the beef has cooled, use a knife or cookie cutter to cut it into 12 squares, similar in size to the slider buns.
Place the bottom half of each slider bun on the sheet pan. Top each bun with a square of cooked beef, followed by a slice of American cheese.
Spread a generous amount of the special sauce on the top half of each slider bun.
Return the sheet pan to the oven and bake for an additional 5-7 minutes, or until the cheese has melted.
Remove the sliders from the oven. Top each one with shredded lettuce, diced pickles, and diced onions.
Finally, place the top half of each slider bun on top of the toppings to complete the sliders.
Optional: Use a pastry brush and brush the tops of the buns with the melted butter, then add a sprinkle of toasted sesame seeds.
Serve the Big Mac Sliders immediately and enjoy the deliciousness!