Whisk the butter and sugars

• Add the softened butter, light brown sugar and granulated sugar to a bowl.
• Whisk together until combined.

Mix in the eggs and vanilla

• Add the eggs and vanilla extract.
• Mix in until fully incorporated.

Add the dry ingredients

• Add the plain flour, bicarbonate of soda and salt.
• Mix until just combined.

Fold in the chocolate chips

• Add the chocolate chips and fold them into the dough.

Spread into the tray

• Scoop the mixture into a baking tray.
• Spread it out evenly.

Top and bake

• Scatter more chocolate chips over the top.
• Bake until set and golden.

Cool and serve

• Let the bars cool fully before cutting.