How to prepare buttermilk sugar cookies
Heat the oven to 190°C (170° fan) 375°F gas 5.
Line 3 large baking trays with non-stick baking paper.
Beat together the sugar, shortening, and salt in a mixing bowl until light and fluffy.
Beat in the egg and vanilla until combined.
Add the flour, bicarbonate of soda and buttermilk and mix until light and fluffy.
Spoon into a piping bag with a large star nozzle.
For each cookie - pipe 1 star and then pipe 6 more stars surrounding the first star onto the baking trays, spacing the cookies about 5cm|2" apart.
Bake for 10-15 minutes until light golden around the edges.
Cool on the trays for 10 minutes, then place on a wire rack to cool completely.