Step 1: Prepare the Special Sauce : In a small bowl, whisk together mayonnaise, ketchup, mustard, Worcestershire sauce, pickle relish, garlic powder, paprika, salt, and pepper. Adjust seasoning to taste and set aside.

Step 2: Form the Slider Patties : In a medium bowl, season ground beef with salt and pepper. Divide the meat into 8 equal portions and shape into small, round patties, slightly larger than the buns as they will shrink while cooking.

Step 3: Cook the Patties : Heat a skillet or grill over medium-high heat. Cook patties 3–4 minutes on the first side, then flip. Place a slice of cheese on each patty during the last minute of cooking to melt. Remove patties from heat and let rest briefly.

Step 4: Toast the Slider Buns : Brush slider buns with olive oil or melted butter. Toast in a skillet, oven, or on the grill for 1–2 minutes until golden and slightly crisp.

Step 5: Assemble the Sliders : Spread a generous amount of special sauce on the bottom half of each bun. Place the cooked beef patty with melted cheese on the bun. Top with pickle slice and thinly sliced onion. Cover with the top half of the bun.

Step 6: Serve : Serve immediately while warm. Optionally, serve with fries, sweet potato fries, or a side salad.