Add the cut chicken to a bowl and stir in the soy sauce, vodka, vinegar, and ginger. Stir to combine and store in the fridge for at least an hour or up to 4.
Mix the flour, cornstarch, lemon pepper, and chili flakes on a wide pan or large shallow bowl.
Transfer the chicken from the marinade to the flour mixture, letting any excess drip off. Toss the chicken in the flour, making sure to coat well.
Bring the oil to 350. Cook the chicken in batches, about 5 minutes, until cooked through. Transfer to a wire rack.
Bring the oil up to 375. Fry the chicken in batches again, just for about 2 minutes this time, until super crispy. Transfer back to the wire rack.
Season with more lemon pepper right when it comes out of the fryer.