Ingredients

Steps

• Preheat the oven to 180°C and line two baking trays with parchment.
• Whisk butter and icing sugar until pale and smooth.
• Beat in the flour gradually followed by salt and vanilla extract.
• Add the egg whites and whisk into the mixture.
• Pipe 8cm lines of mixture onto the trays using a 1cm nozzle.
• Leave 5cm between each biscuit to allow for spreading.
• Chill the trays in the fridge for 20 minutes until firm.
• Bake for 10 to 12 minutes until the edges are light golden-brown.
• Transfer to a wire rack using a palette knife to cool.