# What You'll Need:
→ Chocolate Mixture
01 - 7 oz high-quality dark chocolate (70% cocoa), chopped
02 - 1/2 cup unsalted butter, cut into pieces
→ Wet Ingredients
03 - 1 cup granulated sugar
04 - 1/4 cup packed light brown sugar
05 - 3 large eggs, room temperature
06 - 1 tsp pure vanilla extract
→ Dry Ingredients
07 - 3/4 cup all-purpose flour
08 - 1/3 cup unsweetened cocoa powder
09 - 1/2 tsp fine sea salt
→ Topping
10 - 1/2 tsp flaky sea salt
# Steps:
01 - Preheat the oven to 350°F. Line an 8-inch square baking pan with parchment paper, leaving an overhang for easy removal.
02 - Melt the dark chocolate and butter together in a heatproof bowl set over simmering water, stirring until smooth. Remove from heat and let cool slightly.
03 - In a large bowl, whisk together granulated sugar, brown sugar, eggs, and vanilla extract until the mixture is pale and thick, about 2 to 3 minutes.
04 - Gradually whisk the melted chocolate mixture into the egg mixture until well incorporated.
05 - Sift flour, cocoa powder, and fine sea salt into the wet ingredients. Gently fold with a rubber spatula until just combined, being careful not to overmix.
06 - Pour the batter into the prepared pan and smooth the surface. Evenly sprinkle flaky sea salt over the top.
07 - Bake for 28 to 32 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
08 - Allow to cool completely in the pan on a wire rack before lifting out using the parchment overhang and cutting into squares.