01 - Preheat the vegetable oil in a deep fryer or heavy-bottomed pot to 350°F (180°C). Prepare a plate lined with paper towels for draining.
02 - Slice each jalapeño lengthwise in half and carefully remove the seeds and membranes while wearing gloves.
03 - Combine cream cheese, cheddar, Monterey Jack, chopped green onion, garlic powder, smoked paprika, salt, and black pepper in a bowl until smooth.
04 - Fill each jalapeño half firmly with the cheese mixture, leveling the tops.
05 - Set up three bowls with all-purpose flour, beaten eggs mixed with milk, and panko breadcrumbs.
06 - Dredge each stuffed jalapeño first in flour, then dip into egg mixture, and finally coat with panko breadcrumbs. For added crunch, repeat the egg and breadcrumb coating once more.
07 - Fry the coated jalapeños in batches for 2 to 3 minutes until golden brown and crispy. Remove using a slotted spoon and drain on prepared paper towels.
08 - Allow poppers to cool slightly before serving.