Preheat oven to 210°C (190°C fan) and line a baking tray.
Beat butter briefly to break it up, then mix in sugars until crumbly.
Add chocolate chips + speckled eggs and mix lightly.
Add flour, salt and baking powder and mix until just combined.
Whisk eggs, yolk and vanilla, then mix into dough.
Divide into 125g balls, don’t roll smooth.
Freeze for at least 2 hours.
Bake 16–20 minutes until golden outside and soft inside.
Cool, then top with extra speckled eggs or Easter bunnies