Air Fryer Chicken Sandwich Crispy Buttermilk Crunch

Ingredients

• 4 Boneless, skinless chicken breasts (approx. 600g total)
• 240 ml (1 cup) Buttermilk (full fat)
• 1 tbsp Hot sauce (e.g., Frank’s RedHot, optional but recommended)
• 1 tsp Kosher salt (5g)
• ½ tsp Black pepper (2.5g)
• 2 Large eggs, lightly beaten
• 2 tbsp Buttermilk (reserved from the brine)
• 200g (1 ½ cups) All-purpose flour
• 60g (½ cup) Cornstarch
• 1 tbsp Smoked paprika
• 1 tbsp Garlic powder
• 1 tsp Onion powder
• 1 tsp Baking powder
• 1 tsp Kosher salt
• ½ tsp Cayenne pepper (optional, adjust to taste)
• 4 Brioche or potato buns, split
• Oil spray (neutral oil like canola or sunflower)
• 100g (3-4 oz) Dill pickle chips (thick-cut)
• 120 ml (½ cup) Mayonnaise (full fat)
• 2 tsp Relish or finely diced gherkins
• 1 tsp Dijon mustard