Preheat oven to 425 degrees F and line a baking sheet with parchment paper. Use a serrated knife to remove just a bit of the bottom of each jalapeno half so they sit flat on the baking sheet.
Reserve one cup of shredded cheese and one strip of crumbled bacon for the topping. Mix together the cream cheese, the remaining shredded cheese, bacon, scallions, garlic powder, salt and pepper.
Spoon the bread crumb mixture on top, pressing slightly to adhere. Bake until the filling is bubbly, the jalapenos softened and the bread crumb topping is golden brown, about 20 mins. Serve hot.