Line a cookie sheet with parchment paper; set aside.
Place egg in a shallow bowl and beat well. In another shallow bowl, mix pork rinds, Parmesan cheese, Italian seasoning, and garlic powder; whisk to combine.
Dip each piece of mozzarella in the egg, then roll in the pork rind mixture. Place on prepared baking sheet and freeze, uncovered, for at least one hour or until ready to fry or bake.
Oven: Bake at 400 degree F. for 10-12 minutes, flipping once halfway through, or until golden brown.
Stovetop: Heat 2 tablespoons oil in a large skillet over medium heat. Once hot, fry keto mozzarella sticks in a single layer, 1-2 minutes per side until golden brown and softened.
Air Fryer: Place the frozen mozzarella sticks in the air fryer basket and cook at 390F/198C for 7 minutes.
Serve with marinara sauce.
Notes
Freezing these mozzarella sticks before cooking is very important. Give them at least 1 hour in the freezer before cooking.
Frying makes for crunchier cheese sticks, but baking gives better flavor and easier clean up.
Make sure your coating is fairly thick on each piece of cheese. This will keep the cheese from oozing out. Don't forget to coat the ends of the cheese too.
Coat just one piece of cheese at a time, and avoid handling them more than you need to. Dip into the egg, then the crumbs, then onto the tray. The less you fuss with them the better.
When frying on the stovetop or in the air fryer, never overcrowd the pan or basket.