Ingredients:

  • ½ cup (113g) unsalted butter, softened
  • ½ cup (100g) granulated sugar
  • ¼ cup (50g) packed light brown sugar
  • 1 teaspoon pure vanilla extract
  • ¼ teaspoon salt
  • 1 cup (120g) all-purpose flour, heat-treated
  • ¼ cup (60ml) milk
  • ½ cup (85g) semi-sweet chocolate chips
  • ½ cup (113g) unsalted butter, melted
  • 1 cup (200g) granulated sugar
  • ¾ cup (75g) unsweetened cocoa powder
  • ¼ teaspoon salt
  • 1 teaspoon pure vanilla extract
  • 2 large eggs
  • ½ cup (60g) all-purpose flour
  • Optional: ½ cup (85g) semi-sweet chocolate chips

Instructions:

  1. Heat-treat the flour: Spread flour on a baking sheet and bake at 350°F (175°C) for 5-7 minutes, ensuring it reaches 165°F (74°C) to kill bacteria. Cool completely.
  2. Cream together softened butter, granulated sugar, and brown sugar until light and fluffy.
  3. Beat in vanilla extract and salt.
  4. Gradually add the heat-treated flour, alternating with milk, until just combined. Don't overmix.
  5. Stir in chocolate chips.
  6. Cover and chill in the refrigerator for at least 30 minutes.
  7. Preheat oven to 350°F (175°C). Line an 8x8 inch baking pan with parchment paper or foil, leaving an overhang for easy removal.
  8. In a large bowl, whisk together melted butter, sugar, cocoa powder, and salt until well combined.
  9. Stir in vanilla extract.
  10. Add eggs one at a time, mixing well after each addition.
  11. Gradually add the flour, mixing until just combined. Don't overmix.
  12. Optional: Stir in chocolate chips.
  13. Pour brownie batter into the prepared baking pan and spread evenly.
  14. Drop spoonfuls of chilled cookie dough evenly over the brownie batter.
  15. Use a knife or toothpick to swirl the cookie dough into the brownie batter.
  16. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with moist crumbs attached (not completely clean).
  17. Let the brownies cool completely in the pan before lifting them out using the parchment paper or foil overhang.
  18. Cut into 16 squares and serve.