Crispy Air Fryer Onion Rings

Ingredient:

• 2 large sweet onions, cut into 3/4-inch-thick rounds
• 1 1/4 cups all-purpose flour (about 5 3/8 ounces), divided
• 1 cup whole buttermilk
• 2 large eggs
• 2 teaspoons hot sauce
• 1 teaspoon garlic powder
• 1/2 teaspoon dry mustard
• 1/2 teaspoon baking powder
• 1 tablespoon kosher salt, divided
• 2 1/4 teaspoons onion powder, divided
• 1 1/4 teaspoons paprika, divided
• 1/2 teaspoon plus 1/8 teaspoon black pepper, divided
• 2 cups very finely crushed cornflakes cereal
• Cooking spray
• 1/4 teaspoon MSG (optional)