01 -
Whisk together hoisin sauce, rice vinegar, soy sauce, light brown sugar, minced garlic, ground ginger, red pepper flakes, and 2 teaspoons cornstarch in a medium bowl until well combined. Set aside.
02 -
Combine flour, cornstarch, fine salt, and black pepper in a large sealable bag. Shake thoroughly to blend.
03 -
Place chicken cubes in a bowl and add beaten egg whites. Toss to coat evenly.
04 -
With a slotted spoon, transfer chicken from the egg whites, allowing excess to drip off, and place into the breading mixture. Seal the bag and shake until all pieces are coated.
05 -
Heat vegetable oil in a large skillet over medium-high heat. Fry chicken in batches, ensuring the pan is not crowded, until pieces are golden and cooked through, about 5–7 minutes per batch. Transfer to a tray lined with paper towels.
06 -
Carefully wipe excess oil from the skillet. Pour in the prepared sauce and simmer over medium heat until it thickens slightly, about 2–3 minutes.
07 -
Add the fried chicken to the skillet and toss until thoroughly coated with sauce. Serve immediately with steamed white or brown rice and garnish with sliced green onions if desired.