Ingredients:

  • 200g unsalted butter
  • 200g dark chocolate (70% cacao), chopped
  • 250g granulated sugar
  • 3 large eggs, room temperature
  • 1 tbsp vanilla extract
  • 100g all-purpose flour
  • 30g unsweetened cocoa powder
  • 0.5 tsp fine sea salt
  • 175g semi-sweet chocolate chips
  • 1 tsp flaky sea salt

Instructions:

  1. Preheat your oven to 350°F (180°C) and line an 8x8 inch square pan with parchment paper, leaving an overhang on two sides.
  2. Combine the 200g unsalted butter and 200g chopped dark chocolate in a heat proof bowl. Heat until silky and glossy using your preferred method: microwave in 30-second bursts, stirring between each, or melt over a bain marie.
  3. In a separate large bowl, beat the 3 large eggs and 250g granulated sugar for about 3 full minutes. Stop when the mixture is pale and doubled in volume.
  4. Slowly pour the melted chocolate mixture into the egg mixture while whisking constantly. Add 1 tbsp vanilla extract.
  5. Sift the all-purpose flour, cocoa powder, and fine sea salt into the bowl. Using a silicone spatula, gently fold the dry ingredients into the wet batter until just combined.
  6. Fold in the semi-sweet chocolate chips until evenly distributed.
  7. Pour the batter into the prepared pan and smooth the top. Sprinkle the remaining 25g of chocolate chips and 1 tsp flaky sea salt over the surface. Bake for 25 minutes until the edges are set but the center still wobbles slightly.
  8. Remove from oven, sprinkle with flaky sea salt, and allow to cool completely in the pan before slicing into 16 squares.