1Mix 1 cup of buttermilk, 3/4 cup all purpose flour, 1/2 cup cornstarch, 1 large egg, salt and pepper together. If you don't have buttermilk, mix 1 cup of milk and 1 tablespoon of vinegar, let sit for 10 minutes.
2In a separate ziploc bag, mix 1 cup of cornstarch, 1 teaspoon of onion powder, 1 teaspoon of garlic powder, and 1 teaspoon of dried oregano.
3Add shrimp to wet batter, ensuring they are nicely coated.
4Add the shrimp to the dry batter and shake the bag to coat the shrimp evenly.
5Remove the shrimp from the bag, tapping off any excess powder, and let it sit for 10 minutes.
6Meanwhile, prepare the bang bang sauce by mixing 1/2 cup of Japanese mayo, 1/4 cup of Thai chili sauce, 1 tablespoon of honey, 1-2 tablespoons of sriracha, and 1 teaspoon of rice vinegar.
7Heat oil in a pan and pan-fry the shrimp until golden brown on both sides.
8Drizzle bang bang sauce over the cooked shrimp and mix gently.