Start by creaming the sugars and the butter. Combine well.
Then mix in the espresso powder, eggs, vanilla, flour, baking soda, salt mix well.
Fold in the chocolate chips and nuts
Once everything is well mixed.
Press the dough into the pan, or silicone mold.
Set your air fryer at 220 degrees F, for 15 minutes.
Then check them, then add another 15 minutes.
At this point, my brownies were done, but the actual cooking time will depend on the wattage of your air fryer and the thickness of the brownie mold you use.