Preheat the oven to 375°F (190°C).
Prepare the jalapeños by slicing them in half lengthwise and removing seeds.
In a mixing bowl, combine softened cream cheese, grated Parmesan, chopped prosciutto, garlic powder, onion powder, and black pepper until well mixed.
Stuff each jalapeño half generously with the cream cheese mixture.
Arrange the stuffed jalapeños on a baking sheet lined with parchment paper.
Drizzle olive oil over the jalapeños for added richness and crispiness.
Bake in the preheated oven for 25-30 minutes or until golden and bubbly.
Remove from the oven and allow to cool slightly before serving.