My Grandmother's Crispy Parmesan Fried Chicken

Ingredients

• 4 large chicken thighs (bone-in, skin-on; about 1.5 lbs or 680g)
• 1 cup buttermilk (240ml)
• 1 tablespoon hot sauce (optional)
• 1 cup all-purpose flour (120g)
• 1 cup grated Parmesan cheese (90g)
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon paprika
• ½ teaspoon black pepper
• ½ teaspoon salt
• 2 large eggs
• Vegetable oil (about 4 cups or 960ml for deep frying)