To a large bowl, add the peanut butter, flour, sugar, baking powder, vanilla, salt, and milk.
Combine all of the ingredients well. I like to combine with a spatula first, then use my hands.
Line a baking sheet with parchment paper.
Roll the cookie dough into balls, about 1 inch in diameter and place on the baking sheet.
Using a fork, make an X shape on top of each cookie to flatten it.
Bake the cookies at 350*F/ 175*C for 10 minutes.
Video
Notes
Store the cookies: Leftover no butter peanut butter cookies will keep on the kitchen counter in an airtight container for 3-5 days. Flash freeze leftovers and store them in the freezer for up to 3 months.
Use your hands: I use a wooden spatula to mix all the ingredients and then use my hands to blend them. Since the dough is quite thick this method makes it easier.
Invest in a cookie scoop: Use a cookie scoop or tablespoon to scoop out the dough. You want all the dough balls to be the same size so they cook up at the same pace.
Use fresh peanut butter: It is easier to blend fresh, creamy peanut butter than peanut butter you’ve had in the fridge for months.