Step 1

In a large bowl, mix soy sauce, garlic, ginger, green onion, egg, and buttermilk (if using).

Step 2

Put chicken in bowl and toss to thoroughly coat in the marinade. Cover and chill in the fridge for at least 30 minutes (or as long as overnight).

Step 3

In a separate bowl, whisk flour, cornstarch, and baking powder.

Step 4

Pour a few spoonfuls of the dry ingredient mixture into the bowl with your marinated chicken. Mix until the marinade has become a thick coating and press it into the chicken pieces.

Step 5

Take the chicken pieces and place them into the bowl with the rest of the flour mixture to finish breading. Press the flour coating into the chicken until all pieces are thoroughly covered in a thick coat of the breading.

Step 6

Heat oil in a deep cast iron pan, pot, or deep fryer to 350 degrees F.

Step 7

Fry chicken pieces a few at a time. If using a cast iron skillet, it'll take about 2-3 minutes on each side.

Step 8

Let cool and enjoy!