Melt the chocolate and butter

• Place the chopped dark chocolate and cubed butter in a saucepan.
• Melt over low heat, stirring until smooth and glossy.
• Remove from the heat and let cool slightly.

Whisk the eggs and sugars

• In a mixing bowl, whisk the eggs with the sugar and brown sugar.
• Whisk for a few minutes until pale and slightly thickened.
• Stir in the vanilla extract.

Make the brownie batter

• Pour the melted chocolate mixture into the egg mixture and stir to combine.
• Add the sifted flour, cocoa powder and salt.
• Fold gently with a spatula until just combined, without overmixing.

Bake the deep dish brownies

• Preheat the oven to 180 °C.
• Pour the batter into a greased deep baking dish and spread evenly.
• Bake until the top is set and the center is still slightly fudgy.

Cool and cut

• Let the brownies cool completely in the dish.
• Cut into thick squares and serve.