Preheat oven to 350℉ (180℃)
Prepare 2 baking sheets by lining with parchment paper or silicone baking mats.
In a medium bowl, whisk together flour, baking soda, baking powder and salt. Set aside for later.
1 ½ Cups All Purpose Flour, ¾ teaspoon Baking soda, ½ teaspoon Baking powder, ½ teaspoon Salt
Using a stand mixer with the paddle attachment or a hand mixer, begin mixing butter, brown sugar and granulated sugar until light and fluffy (2 - 4 minutes on medium speed). Scrape sides of bowl as needed.
½ Cup Unsalted Butter, ½ Cup Light brown sugar, ½ Cup Granulated sugar
Add peanut butter to mixing bowl. Mix until well combined.
½ Cup Creamy peanut butter
Add the egg to mixing bowl. Mix on medium speed until incorporated. Scrape sides of bowl as needed.
1 Large Egg
Add the flour mixture and mix on low speed until combined.
Scoop 1 tablespoon of the dough using a cookie scoop or spoon.
Place onto prepared baking pans leaving approximately 2 inches of space between each cookie.
Using your palm or the bottom of a round drinking glass, flatten the cookie slightly.
Bake cookies for 10 - 12 minutes.
Let cookies cool on the baking sheets for 5 to 10 minutes, then transfer to a wire rack to cool completely.