01 - Heat vegetable oil in a deep pot to 350°F. Line a tray with paper towels for draining.
02 - Using gloves, slice jalapeños lengthwise and remove seeds and membranes for milder heat or retain for more spice.
03 - Combine cream cheese, grated cheddar, chopped spring onion, minced garlic, smoked paprika, black pepper, and salt until smooth.
04 - Generously fill each jalapeño half with the cheese mixture, smoothing the surface evenly.
05 - Arrange three bowls: one with flour, one with beaten eggs mixed with milk, and one with breadcrumbs blended with cayenne pepper.
06 - Dredge each stuffed pepper in flour, dip into egg mixture, then thoroughly coat with breadcrumb mixture.
07 - Fry poppers in batches for 2 to 3 minutes, turning occasionally until golden brown and crisp. Drain on paper towels.
08 - Let poppers cool slightly before serving to enhance texture and flavor.