Gingerbread biscuits

Gingerbread biscuits

• 380 g plain flour, plus extra for dusting
• 1 ½ tbsp ground ginger
• 1 tsp mixed spice
• 1 tsp bicarbonate of soda
• 100 g brown sugar
• 150 g golden syrup
• 150 g butter
• 1 pinch sea salt
• 1 egg yolk

Royal icing

• 240 g white sugar
• 1 egg white
• ½ tsp lemon juice
• 1 tsp water, hot (可选的)