Preheat your oven to 375F (190C).

Brown the ground beef in a skillet with onion powder until fully cooked and drain any excess grease.

Slice the entire slab of slider buns in half horizontally.

Place the bottom bun halves in a baking dish, layer with the cooked beef and cheese slices, then cover with the bun tops.

Brush the tops of the buns with melted butter and bake for 15 minutes until the cheese is melted and the buns are toasted.