In a medium sized bowl, mix together flour, baking powder, baking soda and salt. Set aside.
1 3/4 cups all purpose flour, 1/2 tsp baking soda, 1/2 tsp baking powder, 1/2 tsp salt
In a second bowl, using a hand mixer, mix together peanut butter and softened butter.
1/2 cup softened butter, 1 cup peanut butter
Add sugars and mix until well combined
1/2 cup brown sugar, 1/2 cup sugar
Add egg, milk and vanilla and mix
1 egg, 1/2 tsp vanilla, 2 tbsp milk
Slowly add flour in small increments and mix to combine. Be careful not to overmix
Refrigerate dough for 30 min
Using a cookie scoop, scoop balls of dough
Roll dough balls into a ball and roll in sugar
1/3 cup sugar
Set on parchment paper on air fryer tray
Use a fork to flatten cookie
Air fry at 350 for 6 minutes
Let cookies rest for 1-2 minutes before removing from tray so they have a minute to set up
When doing subsequent batches - check at 4-5 minutes as air fryer is already hot and will take less time to cook cookies