Cream the butter and sugars

• Beat the softened butter with the sugar and brown sugar until light and creamy.

Add the egg and vanilla

• Beat in the egg and a splash of vanilla essence until fully combined.

Fold in the dry ingredients

• Add the all-purpose flour and baking soda and mix until just combined.

Add the chocolate

• Fold in the chopped dark chocolate.

Shape the cookies

• Scoop the dough into balls and place them on a baking tray, leaving space between each.

Bake

• Bake at 175 °C until the edges are set and the centres still soft.

Cool

• Let the cookies cool on the tray so they firm up and stay chewy.