01 - Preheat vegetable oil in a deep pot or fryer to 350°F.
02 - Using gloves, slice each jalapeño lengthwise and remove seeds and membranes to reduce heat or keep some for additional spice.
03 - Combine softened 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.
05 - Arrange three bowls: one with flour, one with beaten eggs and milk, and one with breadcrumbs mixed with optional cayenne pepper.
06 - Dredge stuffed peppers in flour, dip into egg mixture, then coat thoroughly with breadcrumb mixture.
07 - Fry in batches for 2–3 minutes until the coating is golden and crisp, turning as needed. Drain on paper towels.
08 - Allow poppers to cool slightly before serving.