Step 1: Preheat your oven to 350°F (175°C) for even baking.
Step 2: Line your 9x13-inch baking pan with parchment paper, leaving overhang for easy removal.
Step 3: Melt the unsalted butter in a medium saucepan over low heat. Add 1 bag of chocolate chips and stir until melted and smooth.
Step 4: Combine the melted chocolate mixture with granulated sugar in a large bowl. Add eggs one at a time, whisking well after each.
Step 5: In another bowl, whisk together flour, baking soda, and salt. Gradually add to the chocolate mixture, stirring until just combined.
Step 6: Fold in the remaining chocolate chips for extra melty chunks.
Step 7: Pour batter into the prepared pan and bake for 25 to 30 minutes, or until a toothpick comes out with a few moist crumbs.
Step 8: Allow brownies to cool in the pan for 10 minutes before lifting out using the parchment paper. Cool completely on a wire rack.
