Clean and trim the chicken livers. Pat them dry with paper towels.

Set the air fryer to 370°F (190°C) to preheat.

In a small microwave-safe bowl, melt 2 tablespoons of butter, then microwave for about 1 minute.

Add the chicken livers to the bowl, tossing them in the butter mixture to coat and season with salt.

Transfer the liver mixture to an air fryer-safe pan or foil container.

Cook at 370°F for about 8 minutes. If using, carefully add the brandy or cognac halfway through cooking, and continue until the livers are fully cooked but still tender.

Place the cooked liver and any juices into a blender or food processor. Add the remaining 2 tablespoons of butter, and blend until smooth.

Spoon the pâté mixture into a serving bowl.

Serve immediately