01 - 
                Heat your oven to 375°F (190°C). Line a 9x13 inch baking pan with parchment paper.
              
              
              
                02 - 
                Mix the flour, baking powder, and sea salt in a large bowl. Set aside.
              
              
              
                03 - 
                In another bowl, mix the softened butter and peanut butter until smooth.
              
              
              
                04 - 
                Gradually add the granulated sugar and brown sugar, mixing until the texture becomes light and fluffy.
              
              
              
                05 - 
                Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
              
              
              
                06 - 
                Slowly blend the dry ingredients into the wet ingredients until just combined.
              
              
              
                07 - 
                Gently fold the peanut butter chips and semi-sweet chocolate chips into the dough.
              
              
              
                08 - 
                Spread the dough evenly into the prepared baking pan.
              
              
              
                09 - 
                Bake for 25-30 minutes, or until the edges are golden, and a toothpick inserted in the center comes out mostly clean.
              
              
              
                10 - 
                Let the bars cool completely in the pan. Lift them out using the parchment paper and cut into squares.