Preheat Air Fryer: Preheat your air fryer to 325°F (160°C) for a few minutes.

Prepare Brownie Mix: Follow the instructions on the Trader Joe's Truffle Brownie Mix package to prepare the batter. Typically, you'll need to combine the brownie mix with eggs, oil, and water in a mixing bowl until well combined.

Grease Baking Dish: Lightly grease a baking dish or pan that fits into your air fryer basket. This will prevent the brownies from sticking to the pan during baking.

Pour Batter into Baking Dish: Pour the prepared brownie batter into the greased baking dish, spreading it out evenly with a spatula.

Place in Air Fryer: Carefully place the baking dish with the brownie batter into the preheated air fryer basket.

Air Fry: Cook the brownies in the air fryer at 325°F (160°C) for about 20-25 minutes, or until the edges are set and a toothpick inserted into the center comes out with a few moist crumbs attached.

Cool and Serve: Once the brownies are cooked, remove them from the air fryer and let them cool in the baking dish for a few minutes. Then, slice into squares and serve.

Optional: Add Toppings: For extra indulgence, you can sprinkle additional chocolate chips or chopped nuts on top of the brownie batter before baking.