Preparation

• Preheat the oven to 350°F (175°C). Prepare an 8×8-inch baking pan by lining it with parchment paper.
• Mix the creamy peanut butter, packed brown sugar, and granulated sugar in a large bowl using an electric mixer. Blend until smooth and creamy, then add the eggs one at a time, mixing well after each addition. Finally, stir in the vanilla extract.
• Whisk together the all-purpose flour and baking powder in a separate bowl. Gradually add this dry mixture to the peanut butter mixture, stirring gently until just combined.
• Fold in the semi-sweet chocolate chips until evenly distributed.
• Pour the batter into the prepared pan, spreading it evenly. Bake for 25-30 minutes or until the top is golden brown.
• Cool completely before slicing into squares.