3 tsp lemon juice
150驳/5陆辞锄 golden syrup
900g/2lb plain flour
1 tbsp bicarbonate of soda
2 tbsp ground ginger
675驳/1陆濒产 icing sugar, sifted
200g/7oz giant milk chocolate buttons
300g/10陆oz dark muscovado sugar
15 yellow or orange boiled sweets
375g/13oz unsalted butter
3 free-range egg whites