1. Prepare the Big Mac Sauce: A Tangy and Flavorful Condiment

1. Combine Ingredients: In a small bowl, combine the mayonnaise, sweet pickle relish, sugar, yellow mustard, paprika, onion powder, and garlic powder.
2. Mix Well: Stir the ingredients together until they are well combined and the sauce is smooth.
3. Set Aside: Set the sauce aside while you prepare the other components.

2. Cook the Ground Beef Mixture: A Savory Foundation

1. Preheat Skillet: Heat a large skillet over medium heat.
2. Add Ground Beef: Add the ground beef, finely chopped white onion, salt, and pepper to the skillet.
3. Cook and Crumble: Cook the ground beef, breaking it up with a wooden spoon or spatula as it cooks, until it’s fully browned and no longer pink, and the onions are soft and translucent.
4. Drain Grease: Remove skillet from heat. Drain off any excess grease from the skillet.

3. Prepare the Baking Dish and Slider Buns: Setting the Stage for Assembly

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Grease Baking Dish: Spray a 9×13 inch baking dish or sheet pan with non-stick cooking spray.
3. Slice Buns: Slice slider buns in half. Do not separate individual rolls.
4. Place Bottoms in Dish: Place the bottom halves of the slider buns in the prepared baking dish, keeping them connected.

4. Assemble the Sliders: Building Layers of Flavor

1. Spread Sauce: Spread a thin layer of the prepared Big Mac sauce evenly over the bottom buns.
2. Add Beef Mixture: Top the sauce with the cooked ground beef and onion mixture, spreading it evenly.
3. Layer Cheese: Top with cheese slices, covering the beef evenly.
4. Add Pickles: Place dill pickle slices on top of the cheese layer, spacing them out so that each slider will have a few pickles.

Option 1: Baking Before Adding Lettuce

1. You can now add the lettuce, more sauce and the tops of the buns.
2. Bake (Partially): Bake in the preheated oven for 8-10 minutes to warm through.
3. Add Lettuce and Sauce: Remove from oven, and add shredded lettuce and more big mac sauce.
4. Add Top Buns: Place the top halves of the slider buns, and brush with melted butter and sprinkle with sesame seeds.
5. Bake Fully: Return to oven and bake for another 3-4 minutes.

Option 2: Adding the Tops of the Buns

1. Spread Sauce: Spread the remaining Big Mac sauce on the underside of the top buns.
2. Place Top Buns: Place the top buns on the sliders, aligning them with the bottom halves.

6. Prepare the Butter Topping: Adding a Golden Finish

1. Melt Butter: In a small bowl, melt 2 tablespoons of butter in the microwave or on the stovetop.
2. Brush and Sprinkle: Brush the tops of the buns with the melted butter. Sprinkle sesame seeds evenly over the buttered tops.

7. Bake the Sliders: Melting the Cheese and Toasting the Buns

1. Cover with Foil: Cover the baking dish loosely with aluminum foil.
2. Bake: Bake in the preheated oven for 10 minutes, or until the cheese is melted and the sliders are heated through.

8. Serve: Enjoying Your Homemade Big Mac Sliders

1. Cool Slightly: Let the sliders cool for a few minutes before serving.
2. Serve Warm: Serve the Big Mac Sliders warm.