Step 1: Preheat the Oven. Start by preheating your oven to 375°F (190°C).
Step 2: Prepare the Jalapeños. Slice the jalapeño peppers in half lengthwise and remove the seeds.
Step 3: Make the Filling. In a mixing bowl, combine cream cheese, scallions, cheddar, chicken, and hot sauce.
Step 4: Season the Filling. Add the beaten egg whites, paprika, garlic powder, chili powder, salt, and pepper.
Step 5: Fill the Jalapeños. Fill each jalapeño half with the buffalo chicken mixture.
Step 6: Coat with Panko. Sprinkle panko crumbs over each popper for crunch.
Step 7: Bake. Lightly spray with cooking spray and bake for 20-25 minutes.
Step 8: Serve and Enjoy! Let cool slightly and serve warm.