Marinate the Chicken: In a bowl, soak chicken pieces in buttermilk for at least 15 minutes.
Prep the Coating: In a shallow bowl, combine cornstarch, flour, garlic powder, paprika, salt, and pepper.
Fry the Chicken: Dredge marinated chicken in the flour mixture and shake off excess.
Heat oil about 1 inch deep in a pan over medium-high heat.
Fry chicken in batches for 3–4 minutes per side until golden and cooked through. Drain on paper towels or a rack.
Make the Bang Bang Sauce: In a bowl, whisk together mayonnaise, sweet chili sauce, sriracha, honey, and rice vinegar.
Toss and Assemble: Just before serving, toss crispy chicken in bang bang sauce.
In each bowl, layer rice, mixed greens, cucumber, and carrot.
Top with sauced chicken, chopped cilantro, and lime wedges.