Preheat your oven to 350°F (175°C) and line your baking pan with parchment paper for easy removal later.
In a saucepan over medium heat, melt the unsalted butter along with one bag of semi-sweet chocolate chips. Stir continuously until smooth and fully combined. Remove from heat and let it cool slightly.
In a large mixing bowl, whisk together the granulated sugar, water or coffee, and the melted chocolate mixture. Add the eggs, one at a time, mixing well after each addition. Stir in the vanilla extract.
In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, stirring until just combined. Be careful not to overmix.
Gently fold in the remaining bag of semi-sweet chocolate chips into the brownie batter, ensuring an even distribution.
Pour the brownie batter into the prepared baking pan and spread it evenly. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
Allow the brownies to cool in the pan for at least 15 minutes before lifting them out using the parchment paper. Cut into squares and enjoy your Boyfriend Brownies!