Preheat your oven and prepare a baking dish with parchment paper.
In a bowl, combine melted unsalted butter, creamy peanut butter, and brown sugar.
Add eggs and vanilla extract to the peanut butter mixture, stirring until smooth.
Incorporate all-purpose flour, baking powder, and a pinch of salt into the mixture.
For extra indulgence, fold in a handful of chocolate chips into the batter.
Spread the batter evenly in the prepared baking dish.
Bake the blondies until they're golden brown and a toothpick comes out with a few moist crumbs.