01 - Preheat your oven to 375°F. Lightly grease a medium baking dish, approximately 1.5–2 quart capacity.
02 - In a large mixing bowl, thoroughly combine the softened cream cheese, sour cream, shredded cheddar, and shredded Monterey Jack cheese until the mixture is smooth and uniform.
03 - Stir in the diced jalapeños (remember to reserve some for the final garnish), crumbled bacon (if using), garlic powder, onion powder, smoked paprika, black pepper, and a pinch of salt. Mix well until all ingredients are evenly distributed.
04 - Evenly spread the prepared dip mixture into the greased baking dish.
05 - In a separate small bowl, combine the panko breadcrumbs with the melted butter and grated Parmesan cheese. Sprinkle this topping evenly over the dip mixture in the baking dish.
06 - Bake the dip for 20–25 minutes, or until it is bubbly around the edges and the topping has achieved a golden brown color.
07 - Remove the dip from the oven. If desired, garnish with the reserved jalapeño slices and fresh chives. Allow the dip to cool for 5 minutes before serving.
08 - Serve the warm jalapeño popper dip with an accompaniment of tortilla chips, crackers, or toasted baguette slices.