Take a mixing bowl to add all the dry ingredients.
Take another bowl to add butter and peanut butter and mix them with an electric mixer or a wooden spatula.
After your butter is mixed add sugars and mix. Then add the milk, egg, vanilla extract.
Slowly add the dry ingredients mix them and form a dough.
Preheat your air fryer at 350F for 3-5 minutes.
Take about a tablespoon of dough each to make balls. You can use a fork to press the ball or simply you can gently press it with your fingers.
Cook at 350F for 8-10 minutes or until golden brown.
Let them cool before you serve.