In one bowl, whisk together buttermilk, egg, garlic powder, paprika, salt, and black pepper to make your wet batter.
In another bowl, whisk together cornstarch, breadcrumbs, salt, garlic powder, paprika, and black pepper to make your dry batter.
In a third bowl, combine mayo, sweet chili sauce, minced garlic, black pepper, rice vinegar, sriracha, and dried parsley to make the bang bang sauce.
Heat oil to 350°F.
Dip shrimp in wet mixture. Let any excess drip off. Then coat evenly in dry mixture. Shake off any excess.
Drop in the oil and fry until golden brown all around.
Drizzle some of the sauce on top.
Serve with steamed rice or vegges!