01 - Slice each jalapeño pepper lengthwise and carefully remove seeds and membranes using a small spoon while wearing gloves.
02 - Combine softened cream cheese, shredded cheddar, chopped spring onion, garlic powder, smoked paprika, salt, and black pepper in a bowl; mix until smooth.
03 - Fill each jalapeño half generously with the cheese mixture, smoothing the surface evenly.
04 - Arrange flour in one shallow bowl, whisk eggs and milk together in a second, and combine breadcrumbs with cayenne pepper in a third.
05 - Dip stuffed jalapeños sequentially in flour, egg mixture, and breadcrumb mixture, pressing firmly to adhere.
06 - Heat 2 inches of vegetable oil in a deep pan to 350°F (175°C).
07 - Fry breaded jalapeños in batches for 2 to 3 minutes until golden and crisp, then drain on paper towels.
08 - Serve poppers warm, optionally accompanied by ranch dressing or preferred dipping sauce.