Preheat your oven to 350°F (175°C). Gather and prepare your ingredients.

In a large mixing bowl, combine the softened butter, granulated sugar, and brown sugar. Beat until light and fluffy.

Add peanut butter, egg, and vanilla to the butter and sugar mixture. Mix well until combined.

In a separate bowl, whisk together flour, baking soda, baking powder, and salt. Set aside.

Gradually add the dry mixture to the wet ingredients. Mix on low until just combined.

Roll the dough into 1-inch balls and place them on a parchment-lined baking sheet.

Gently press down on each cookie ball with a fork to flatten slightly and create a criss-cross pattern.

Bake for 10-12 minutes, until edges are golden brown and centers remain soft.

Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.