Preheat oven to 350F degrees.

Combine the chocolate chips and butter in a medium heatproof bowl. Fill a medium saucepan with about two inches of water and place over low-medium heat. Place the bowl over the saucepan and let the mixture melt, stirring continuously until it is shiny and smooth.

In a large bowl using an electric mixer, beat eggs and sugar on medium speed, about a minute or until thick. Add flour, baking powder, and salt; mix just until combined.

Add chocolate mixture and vanilla extract; stir well. Fold in chopped walnuts.

Spread evenly into prepared baking pan. Bake for 25-35 minutes. Insert a toothpick into the center of the brownies; if it comes out slightly moist with batter it is done. Cool completely in pan on wire rack.

Once brownies are completely cooled, lift up the ends of the parchment paper or foil liner, and transfer to a cutting board. Cut into bite-size squares. Eat & Enjoy!