Melt the butter and chocolate

• Melt the butter in a saucepan over low heat.
• Add the chocolate chips and stir until completely smooth and melted.

Whisk the sugars, eggs and vanilla

• In a large bowl, combine the white sugar, brown sugar, eggs and vanilla paste.
• Whisk well until the mixture turns a light yellow color.

Combine the wet mixtures

• Pour the melted chocolate mixture into the egg mixture.
• Whisk until fully incorporated.

Fold in the dry ingredients

• Add the cocoa powder, flour, cornstarch and baking soda.
• Fold everything together gently, without overmixing.

Add the chocolate chips

• Fold in the chocolate chips until just combined.

Spread in the pan

• Line a pan with parchment paper.
• Spread the batter evenly.
• Scatter more chocolate chips on top and press them in lightly.

Bake

• Bake at 180 °C until the brownies are set with a fudgy center.

Cool and cut

• Let the brownies cool in the pan before cutting into squares.