01 - Preheat vegetable oil in a deep pot or fryer to 350°F.
02 - Slice each jalapeño lengthwise while wearing gloves; remove seeds and membranes to reduce heat or leave some for extra spice.
03 - Combine softened cream cheese, grated cheddar, chopped spring onion, minced garlic, smoked paprika, black pepper, and salt until smooth.
04 - Fill each jalapeño half generously with the cheese mixture, smoothing the surface.
05 - Arrange three bowls: one with flour, one with beaten eggs and milk combined, and one with breadcrumbs mixed with cayenne pepper.
06 - Dredge each stuffed pepper in flour, then dip into the egg mixture, and finally coat thoroughly with breadcrumb mixture.
07 - Fry poppers in batches for 2 to 3 minutes, turning occasionally until golden brown and crispy. Drain on paper towels.
08 - Allow poppers to cool slightly before serving.