In a bowl, mix flour, cornstarch, baking powder, and all seasonings.
Take about half of that mixture and combine it with eggs and water to make a thick batter.
Cut chicken breasts into strips, then into bite-sized cubes.
Add chicken to the wet batter and mix until fully coated.
Transfer to the dry mixture and coat well (shake in a bowl or bag for easier breading).
Heat oil to 350–360°F.
Fry in batches for 3–3½ minutes until golden and crispy.
Let drain, then toss in your favorite sauce.
