Add 1 1/3 cup of chocolate chips and 1/2 cup butter to a small microwaveable bowl.
Microwave for 30 seconds, then mix, repeat until all of the chocolate is melted. Mix until smooth.
Let the chocolate mix for a few minutes, then mix in the 1/2 cup granulated sugar, 2 large eggs and 1 1/2 teaspoon pure vanilla extract mix until smooth.
In a large mixing bowl, fold in the 3/4 cup all-purpose flour, 3 tablespoons cocoa powder, and 1/4 teaspoon salt. Mix well, then add the rest of the chocolate chips.
Spray your pan with cooking spray, then spread 1/2 the batter into the greased pan, stack your Oreos on top. Then spread the rest of the batter on top. Dice the rest of the Oreos, and spread them on top. Add some extra chocolate chips, if you wish.
Set your pan into the air fryer basket, and set the temperature to 320 degrees F, air fryer setting for 20-25 minutes. Or until the brownies are cooked all the way through, use a toothpick and insert it into the brownies center. When it comes out clean, remove it from the air fryer.