Directions

1. Preheat the oven to 180°C and line 2 baking sheets with parchment paper.
2. Whisk the butter, sugar and salt until pale and fluffy. Add the vanilla extract and egg; beat until combined.
3. Gradually add the flour until just thoroughly combined.
4. Transfer the batter to the pastry bag fitted with large open star tip. Squeeze 5cm circles into the prepared baking sheets and sprinkle with granulated or sanding sugar.
5. Bake for about 15 minutes, rotating pans halfway through until the edges are light golden brown.
6. Let it cool completely before storing in an airtight container.