Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
Step 2: Line a cookie sheet with parchment paper or a silicone baking mat to prevent sticking.
Step 3: In a medium bowl, whisk together the all-purpose flour, baking soda, baking powder, and salt. Set aside.
Step 4: In a large mixing bowl, cream together the unsalted butter, creamy peanut butter, light brown sugar, and granulated sugar for 2-3 minutes until light and fluffy.
Step 5: Beat in the large egg and vanilla extract until the mixture is smooth and creamy.
Step 6: Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed until just combined.
Step 7: Using a cookie scoop or tablespoon, scoop dough and roll into balls. Roll each ball in extra granulated sugar before placing them on the cookie sheet, spacing them about 2 inches apart.
Step 8: Press down on each cookie ball with a fork to create a criss-cross pattern.
Step 9: Bake for 10-12 minutes until edges are lightly golden. Cookies may look underbaked but will firm up as they cool.
Step 10: Let the cookies cool on the sheet for 5 minutes before transferring to a wire rack to cool completely.
