Β½ tsp bicarbonate of soda
100²µ/3Β½΄Η³ϊ light brown sugar
100²µ/3Β½΄Η³ϊ caster sugar
80g/3oz milk chocolate chips
Β½ tsp salt
Β½ tsp vanilla extract
300g/10Β½oz gluten-free plain flour
120g/4oz unsalted butter, melted
1 large free-range egg
160g/6oz mini eggs, crushed