Preparation Steps

• Preheat oven to 350°F (175°C). Grease a 9x13 inch baking pan.
• In a bowl, whisk together flour, baking powder, and salt. Set aside.
• In another bowl, beat melted butter, peanut butter, brown sugar, and granulated sugar until smooth.
• Add eggs and vanilla extract to the peanut butter mixture and mix well.
• Gradually add the dry ingredients to the wet mixture and stir until combined.
• Fold in the chocolate chips, if using.
• Spread the batter evenly in the prepared baking pan.
• Bake for 25 minutes or until the top is golden and a toothpick inserted in the center comes out clean.
• Allow to cool before cutting into squares and serving.