In a large mixing bowl, mix the flour, baking soda, baking powder, salt.
Then mix in the Greek yogurt, vanilla, eggs, sugar, and butter.
Mix well, fold in the ground cinnamon and walnuts, mix well.
Pour the batter into a greased air fryer-safe pan.
Set the pan into the air fryer, and set the temperature to 320 degrees F, air fryer setting for 15-20 minutes.
When the time is up, place a toothpick in the pound cake, and check to see that the toothpick comes out clean. If not, add another 5 minutes.
Plate, serve, and enjoy!