Begin by melting the finely chopped chocolate in a completely dry microwave safe bowl in the microwave oven in 10 seconds bursts. Stir in between. Do this until the chocolate is completely melted. It'll look silky smooth & shiny. Set it aside.
Mix the sugar and melted butter together until just combined. You can use a hand whisk or a fork to do the job.
Crack a room temperature egg and whisk to mix it with the sugar butter mixture. Whisk until the egg is uniformly combined.
Now, add the vanilla extract and give the wet ingredients a quick stir.
In a separate bowl whisk together all the dry ingredients (until just combined) like the flour, cocoa powder, salt & the baking powder. Use a fork or a hand whisk.
Now, add the dry ingredients to the wet ingredients and mix well with the help of a spatula until combined. Avoid over mixing.
Add the melted chocolate and gently fold it in into the brownie batter with the help of a spatula.
Now, for a super fudgy and moist brownie add in the roughly chopped chocolate and gently fold it in the brownie batter. The batter is ready.
Place the air fryer basket inside the steel insert of the Instant Pot (make sure the Instant pot is unplugged) and place the perforated metal disc inside the air fryer basket.
Line a 6 inch cake mold with parchment paper (makes it so easy to take out the brownie without breaking it).
Transfer the brownie batter into the parchment layered cake pan. Try to spread it evenly with the help of a spatula as much as you can (it's a super thick batter).
Place the cake pan on the perforated metal disc inside the air fryer basket.
Secure the Air Fryer lid and plug it in. Hit the Air Fryer button and Air Fry at 350 degrees F for 15 minutes.
Once, the cooking cycle is over the Instant Pot will begin to beep. Hit the CANCEL button and open the air fryer lid carefully and place it on top of the heat proof lid base (comes along with the air fryer lid).
Insert a tooth pick at the center of the brownie to check the doneness. The toothpick must not come out clean.
Bring out the cake pan and place it on top of the kitchen counter and allow it to rest for at least 30 minutes or until the brownie have come down to the room temperature.
Grab the ends of the parchment paper and carefully bring out the brownie. Slice and serve with vanilla ice-cream. Enjoy!