Step 1 – Prepare the Tin
Preheat your oven to 175°C (160°C fan). Line an 8-inch (20 cm) square baking tin with baking parchment, leaving a slight overhang to make the brownies easier to remove.
Step 2 – Melt the Chocolate
Place the Callebaut Dark Chocolate Callets and butter in a heatproof bowl set over a pan of gently simmering water, ensuring the bowl does not touch the water. Stir until smooth and glossy, then remove from the heat and allow the mixture to cool slightly.
Step 3 – Make the Batter
In a large bowl, whisk together the eggs and caster sugar for 2 to 3 minutes until the mixture becomes pale and slightly thickened. Stir in the vanilla extract.
Gradually pour in the melted chocolate mixture and mix until fully combined.
Sift in the plain flour, cocoa powder and salt, then gently fold everything together using a spatula until no dry streaks remain. Avoid overmixing, as this helps keep the brownies rich and fudgy.
Fold through the extra chocolate callets or chocolate chunks if using.
Step 4 – Bake
Pour the batter into the prepared tin and spread it evenly.
Bake for 25–30 minutes, or until the top is shiny and set while the centre still has a slight wobble. A skewer inserted into the middle should come out with a few moist crumbs rather than wet batter.
Step 5 – Cool and Serve
Leave the brownies to cool completely in the tin before lifting them out and slicing into squares. Serve on their own, dusted with icing sugar, or with vanilla ice cream, whipped cream or fresh berries.