01 - Peel the onions and slice them into thick rings about 1/2 inch wide. Carefully separate into double rings to create space for the cheese filling.
02 - In a mixing bowl, combine the softened cream cheese, shredded cheddar, shredded mozzarella, and diced jalapeños until well blended and uniform.
03 - Gently spread the cheese mixture between two nested onion rings, pressing firmly to seal the edges. Continue until all filling and onion rings are assembled.
04 - Arrange three separate bowls: one with flour, one with eggs whisked together with milk, and a third with panko breadcrumbs mixed with smoked paprika, garlic powder, salt, and pepper.
05 - Dip each stuffed onion ring into the flour, then into the egg wash, and coat thoroughly with the seasoned panko mixture. For extra crunch, repeat the egg and panko coating step a second time.
06 - Place the breaded rings on a parchment-lined baking sheet and freeze for 30 minutes so they hold their shape during frying.
07 - Heat vegetable oil in a large heavy pot to 350°F. Fry the rings in batches for 2-4 minutes until deeply golden brown and crisp. Drain on paper towels.
08 - Serve hot with ranch dressing, chipotle mayo, or your favorite dipping sauce.