Spicy Crispy Chicken Burger

• 4 boneless chicken thighs (see notes)
• 2 egg whites
• 1 tbsp flour
• 2 tbsp gochugaru (see notes)
• 1 tbsp paprika
• 1 tbsp garlic powder
• 1/2 tsp salt
• 1/2 tsp sugar
• 2 cups flour
• 2 tbsp gochugaru
• 1 tbsp paprika
• 1 tbsp garlic powder
• 1 tbsp onion powder (optional)
• 1 tsp baking powder
• 1/4 tsp salt
• 1/2 tsp sugar
• 2 tbsp Japanese mayo
• 1 tbsp sweet chili sauce
• 1 tbsp Sriracha
• 1/2 tbsp light soy sauce
• 1/2 tbsp rice vinegar (or white vinegar)
• 1/2 tbsp chili flakes
• 3 cups ice cold water
• burger buns
• lettuce
• American cheese slices

Directions