Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a large mixing bowl, combine creamy peanut butter, softened unsalted butter, granulated sugar, and brown sugar.

Add one large egg and vanilla extract, and beat until well combined.

In a separate bowl, whisk together all-purpose flour, baking powder, and salt.

Gradually add the dry mixture to the wet ingredients and mix until just combined.

Scoop out tablespoons of dough and shape into 1-inch balls.

Roll each ball in additional granulated sugar to coat them.

Place the sugar-coated balls on baking sheets, spacing them 2 inches apart and flatten slightly with a fork.

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

Cool on baking sheets for about 5 minutes before transferring to a wire rack.