Ingredients:

  • 1/2 cup (115g) unsalted butter, melted and hot
  • 1 cup (200g) granulated sugar
  • 2 large eggs, room temperature
  • 2 tsp vanilla extract
  • 1/2 cup (45g) Dutch process cocoa powder
  • 1/2 cup (65g) all purpose flour
  • 1/4 tsp salt
  • 1/2 cup (90g) dark chocolate chips
  • 1/2 cup (115g) unsalted butter, softened
  • 1/2 cup (100g) brown sugar, packed
  • 1/4 cup (50g) granulated sugar
  • 1 large egg, room temperature
  • 1 1/4 cups (160g) all purpose flour
  • 1/2 tsp baking soda
  • 1/2 tsp salt
  • 3/4 cup (135g) semi sweet chocolate chips

Instructions:

  1. Preheat your oven to 350°F and grease a 9x9 inch baking pan.
  2. Whisk the hot melted butter and granulated sugar until the mixture looks shiny and smooth. Note: This takes about 2 minutes of vigorous whisking.
  3. Add the 2 eggs and vanilla to the brownie mix, beating until the batter is pale and thick.
  4. Sift in the cocoa powder, flour, and salt, then fold in the dark chocolate chips.
  5. Spread the brownie batter into the pan until it reaches every corner evenly.
  6. Cream the softened butter, brown sugar, and granulated sugar in a separate bowl until light and fluffy.
  7. Mix in the remaining egg, then stir in the flour, baking soda, and salt.
  8. Fold in the semi sweet chocolate chips to complete the cookie dough.
  9. Drop spoonfuls of cookie dough onto the brownie base and gently press down.
  10. Bake for 35 minutes until the cookie top is golden and the center is set.