1Mix 1 cup of buttermilk (or 1 cup of milk and 1 tablespoon of vinegar, let sit for 10 minutes), 3/4 cup all-purpose flour, 1/2 cup cornstarch, 2 eggs, salt, and pepper in a bowl.
2In a ziploc bag, mix 1 cup of cornstarch, 1 teaspoon each of onion powder, garlic powder, and dried oregano.
3Add shrimp to the wet batter, then transfer to the dry batter, shaking to coat evenly.
4Let the shrimp sit for 10 minutes.
5Meanwhile, prepare the bang bang sauce by mixing 1/2 cup Japanese mayonnaise, 1/4 cup Thai chili sauce, 1 tablespoon of honey, 1-2 tablespoons of Sriracha, and 1 teaspoon of rice vinegar.
6Pan-fry the shrimp until golden brown.
7Drizzle the bang bang sauce over the cooked shrimp and toss gently.