01 - Slice each jalapeño in half lengthwise and carefully remove seeds and membranes using a small spoon while wearing gloves to avoid skin irritation.
02 - Combine softened cream cheese, shredded cheddar, finely chopped spring onion, garlic powder, smoked paprika, salt, and freshly ground black pepper in a bowl until smooth.
03 - Generously fill each jalapeño half with the cheese mixture, smoothing the surface evenly.
04 - Arrange flour in one shallow bowl; whisk eggs and milk together in a second bowl; mix panko breadcrumbs and cayenne pepper in a third bowl.
05 - Dip each stuffed jalapeño first into the flour, then the egg mixture, and finally coat with the breadcrumb mixture, pressing gently to adhere.
06 - Heat vegetable oil to 350°F (175°C) in a deep pan until it reaches a 2-inch depth.
07 - Fry the poppers in batches for 2 to 3 minutes until golden brown and crisp, then drain on paper towels.
08 - Serve hot with optional ranch dressing or preferred dipping sauce.