Wash and prepare the potatoes. Place chopsticks on both sides of a potato and slice thinly from the top, ensuring the bottom remains intact.

Melt 2 tsp of butter in the microwave. Mix in 1 pinch of salt, 1 pinch of sugar, and a pinch of parsley powder.

Using a brush, apply the butter mixture between the slices of the potato.

Place the potatoes on parchment paper and cook in an air fryer at 180°C (356°F) for 20 minutes.