Unwrap mozzarella string cheese sticks and slice each in half crosswise to create 24 evenly sized sticks. Place on a baking sheet and freeze for 30 minutes until rock solid. (Freezing is mandatory to prevent blowouts during cooking!)

Set up a breading station with three shallow bowls: Bowl 1: Flour with a pinch of salt. Bowl 2: Eggs whisked with 1 tablespoon milk. Bowl 3: Panko breadcrumbs tossed with grated parmesan, Italian seasoning, garlic powder, paprika, and sea salt.

Double-dredge the cheese: Roll each frozen cheese stick in flour, dip into egg wash, then coat in seasoned panko. Dip BACK into egg wash and coat a second time in panko, pressing firmly so breadcrumbs adhere completely without any exposed cheese.

Return double-breaded mozzarella sticks to the freezer for at least 1 hour (or up to overnight) until frozen solid.

Preheat air fryer to 390°F (200°C) for 3 minutes. Generously mist the air fryer basket with olive oil spray.

Arrange frozen mozzarella sticks in a single layer with space between them. Do not overcrowd (cook in two batches if necessary). Spray the tops generously with olive oil spray.

Air-fry at 390°F (200°C) for 6 to 8 minutes, flipping gently with silicone tongs at the 4-minute mark, until the crust is deeply golden-brown and crunchy. Keep a close eye during the final minute to remove right as cheese begins to soften before any bursting happens.

Let rest in the basket for 2 minutes to allow cheese to settle. Serve immediately piled high with warm marinara sauce for dipping!