Preheat your oven to 350°F (175°C).

Slice each slider bun in half horizontally and place the bottom halves in a greased baking dish.

Layer pepperoni slices generously over each bun followed by shredded mozzarella cheese. Drizzle marinara sauce on top, then place the top halves back on.

In a small bowl, mix melted butter with garlic powder and Italian seasoning. Brush the mixture over the top of each bun.

Bake for 15-20 minutes until the cheese is bubbly and the tops are golden brown.

Let cool slightly before slicing apart and serve warm with extra marinara sauce for dipping.