Preheat the airfryer to 300 degrees Fahrenheit.
Cream the butter and sugar into a mixing bowl until fluffy using a stand mixer or hand mixer.
Add in each egg one at a time until fully combined.
Slowly add in the vanilla extract into the mixing bowl and mix again until smooth.
Sift in the flour, baking powder and salt slowly while mixing on low speed to avoid spraying ingredients everywhere.
Lightly butter the pound cake pan, pour batter into it and air fry for 1 hour 10 minutes on 300 degrees Fahrenheit.
After it has cooked, use a toothpick to check the doneness of the pound cake before removing from air fryer, making sure it comes out clean.
Mix together the confectioners sugar and lemon juice.
Pour it on top of the cake. Let it cool and enjoy!