Cream the softened butter in a large mixing bowl until smooth and pale, about 2 minutes.
½ cup salted butter
Add the granulated sugar and brown sugar, then continue mixing for another 2 minutes until the mixture looks light and fluffy.
½ cup granulated sugar, ½ cup light brown sugar
Stir in the peanut butter, followed by the egg, mixing until everything is fully combined and smooth.
½ cup smooth peanut butter, 1 large egg
In a separate bowl, whisk together the flour, baking soda, baking powder, and salt.
1⅓ cups plain flour, ¾ teaspoon baking soda, ½ teaspoon baking powder, 1 pinch Salt
Add the dry ingredients to the peanut butter mixture and gently mix until just combined, stopping as soon as no dry flour remains.
Gather the dough into a flat disc, wrap it tightly, and refrigerate for at least 2-4 hours (or up to 24 hours). Chilling the dough helps the cookies hold their shape and improves the texture.
When ready to bake, preheat the oven to 190°C (375°F). Line or lightly grease your baking sheets if needed.
Scoop the chilled dough into balls about 3 cm (1¼ inches) wide and place them on the baking sheet, leaving space between each cookie.
Use a fork to gently press a criss-cross pattern on top of each dough ball.
Bake one tray at a time on the center rack for 9-11 minutes, until the edges are lightly golden but the centers still look soft.
Let the cookies rest on the baking tray for 1 minute before transferring them to a wire rack to cool completely. Repeat with the remaining dough.
Notes
Tips and Tricks
Soft centers: Remove the cookies while they still look slightly underbaked in the middle, they'll firm up as they cool.
Don't skip the chill: Chilled dough prevents spreading and gives you thicker, chewier cookies.
Perfect fork marks: Dip the fork in sugar before pressing to prevent sticking and add extra crunch.
Extra flavor: Use a high-quality peanut butter for the richest taste.
Storage: Store cooled cookies in an airtight container at room temperature for up to 4 days, or freeze for longer storage.