Chicken Wings for Halal Cart Fans

Name: Chicken Wings for Halal Cart Fans
Ingredients: Chicken Marinade:; 2 pounds chicken wings (drumettes, wingettes, or both); 1 cup buttermilk; 1 tablespoon garlic powder; 2 teaspoons ground turmeric; 2 teaspoons onion powder; 1 teaspoon kosher salt; Spice Mix:; 2 tablespoons chili powder; 2 tablespoons confectioners' sugar; 2 tablespoons ground coriander; 2 tablespoons granulated garlic; 2 tablespoons onion powder; 2 tablespoons smoked paprika; 1 tablespoon ground cumin; White Sauce:; 1 cup mayonnaise; 1/2 cup sour cream; 3 tablespoons white vinegar, plus more to taste; 2 large garlic cloves, finely grated (preferably on a Microplane); 1 tablespoon freshly ground black pepper; 1 teaspoon onion powder; 1 teaspoon granulated garlic; Frying & Serving:; Canola oil, for deep-frying; Kosher salt, for seasoning; 1 1/2 cups all-purpose flour; Cilantro leaves, lime wedges, and hot sauce, for garnish (optional)