Taiwanese Popcorn Chicken

Name: Taiwanese Popcorn Chicken
Ingredients: 1 1/2 to 2 pounds chicken thighs; 3 garlic cloves, minced; 1/2 teaspoon minced ginger; 1 tablespoon soy sauce; 1 tablespoon Shaoxing rice wine (or sake); 1/2 teaspoon white pepper; 1/8 teaspoon black pepper; 1 teaspoon Chinese five-spice powder; 1 teaspoon salt; 2 tablespoons sugar; 1 cup sweet potato flour (look for coarse sweet potato flour with flakes for better crunch, but if you can't find flour, 2/3 cup sweet potato starch, cornstarch, or sweet rice flour mixed with 1/3 cup cornmeal or Panko will work); 1/2 teaspoon baking powder; 2 cups neutral-flavored oil, or enough to fill a deep-sided pot or wok 1-inch deep; 1 cup basil leaves; 1 teaspoon Taiwanese white pepper salt (or 1/2 teaspoon salt, 1/4 teaspoon black pepper, and 1/4 teaspoon white pepper); Paprika, to taste; Chinese five-spice powder, to taste