Step 1: Preheat your oven to 350°F (175°C) for even baking.
Step 2: Grease a 9x13 inch baking pan or line it with parchment paper.
Step 3: In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
Step 4: In a large bowl, cream the unsalted butter, light brown sugar, and granulated sugar with an electric mixer until light and fluffy.
Step 5: Add the creamy peanut butter, egg, and vanilla to the butter mixture. Beat until smooth.
Step 6: Gradually mix the dry ingredients into the wet ingredients until just combined.
Step 7: Fold in the chocolate chips and peanut butter chips.
Step 8: Spread the batter in the prepared baking pan and bake for 25-30 minutes.
Step 9: Let cool for 15 minutes before transferring to a wire rack to cool completely before cutting into squares.
