01 - Heat the grill or skillet over medium-high heat until hot.
02 - In a mixing bowl, gently combine ground beef, salt, black pepper, and garlic powder without overworking.
03 - Divide the beef mixture into 8 equal portions and shape into small patties slightly larger than the buns, accounting for shrinkage during cooking.
04 - Brush the cut sides of the slider buns with melted butter, then toast them cut side down on the grill or skillet until golden brown. Set aside.
05 - Place the patties on the grill or skillet and cook for 2–3 minutes per side until desired doneness is reached.
06 - During the last minute of cooking, place a cheese slice on each patty and cover to allow melting.
07 - Place each cheesy patty on a bottom bun, top with dill pickle slices and optional red onion, add ketchup and mustard if desired, then cap with the top bun.
08 - Serve the sliders immediately while warm.