Ingredients:

  • 3/4 cup (170g) unsalted butter, melted and hot
  • 1 cup (200g) granulated sugar
  • 1/2 cup (100g) light brown sugar, packed
  • 2 large eggs, room temperature
  • 1 tbsp (13g) vanilla extract
  • 3/4 cup (75g) Dutch-processed unsweetened cocoa powder
  • 3/4 cup (95g) all-purpose flour
  • 1/2 tsp (3g) sea salt
  • 1 cup (170g) semi-sweet chocolate chips
  • 1/2 cup (125g) creamy peanut butter
  • 2 tbsp (15g) confectioners' sugar
  • 1 tbsp (15g) melted butter

Instructions:

  1. Preheat your oven to 350°F (180°C).
  2. In a large bowl, whisk together the 3/4 cup hot melted butter, granulated sugar, and light brown sugar.
  3. Stir in the 3/4 cup cocoa powder while the butter is still warm until the mixture looks glossy and smooth.
  4. Add the 2 eggs and vanilla extract to the chocolate mixture. Whisk vigorously for about 2 minutes until the batter lightens in color and looks velvety.
  5. Gently fold in the 3/4 cup all purpose flour and sea salt using a spatula. Stop mixing as soon as the last streak of flour disappears to ensure the brownies don't become tough.
  6. Fold in the 1 cup semi sweet chocolate chips.
  7. In a small bowl, stir together the 1/2 cup creamy peanut butter, 2 tbsp confectioners' sugar, and 1 tbsp melted butter. This mixture should be thick but pourable so it stays on top of the batter.
  8. Pour the brownie batter into your prepared 8x8 pan and smooth the top.
  9. Drop dollops of the peanut butter mixture onto the surface.
  10. Use a butter knife to swirl the peanut butter into the chocolate until you see beautiful marble patterns.
  11. Bake for 30 minutes. The edges should be set, but the center should still have a very slight jiggle.
  12. Let the brownies cool completely in the pan for at least 1 hour. Slice into 16 squares once fully set.