1. Preheat the Oven:
   • Preheat your oven to 350°F (175°C). Grease or line an 8×8-inch baking pan with parchment paper.
2. Melt the Chocolate and Butter:
   • In a medium saucepan over low heat, melt the unsalted butter and chopped semi-sweet chocolate, stirring constantly until smooth. Remove from heat and set aside to cool slightly.
3. Mix the Wet Ingredients:
   • In a large mixing bowl, whisk together the granulated sugar, brown sugar, eggs, and vanilla extract until well combined.
4. Add the Chocolate Mixture:
   • Pour the melted chocolate mixture into the sugar and egg mixture, stirring until fully incorporated.
5. Add the Dry Ingredients:
   • Sift together the all-purpose flour, cocoa powder, and salt. Gradually fold the dry ingredients into the wet mixture, stirring until smooth and combined.
6. Bake the Brownies:
   • Pour the brownie batter into the prepared baking pan and spread it evenly. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs. Let the brownies cool completely before adding the cookie dough layer.

For the Cookie Dough (to top the brownies):

• 1/2 cup unsalted butter, softened
• 1 cup all-purpose flour (heat-treated to kill bacteria)
• 1/4 cup granulated sugar
• 1/2 cup brown sugar, packed
• 1 teaspoon vanilla extract
• 1/4 teaspoon salt
• 2-3 tablespoons milk (or as needed)
• 1/2 cup mini chocolate chips

Instructions for the Cookie Dough:

1. Mix the Cookie Dough:
   • In a medium bowl, beat together the softened butter, granulated sugar, brown sugar, vanilla extract, and salt until light and fluffy.
   • Gradually mix in the flour, adding it in small amounts at a time. If the dough is too thick, add 1-2 tablespoons of milk until you achieve a thick, dough-like consistency.
2. Add the Chocolate Chips:
   • Fold in the mini chocolate chips until evenly distributed.
3. Top the Brownies:
   • Once the brownies are completely cooled, spread the cookie dough evenly on top of the brownies. Press down gently to create a smooth layer.
4. Serve:
   • Cut into squares and serve! For an extra treat, refrigerate for 30 minutes before serving to allow the layers to firm up a bit.