Pre-heat the oven to 160 degrees celcius or 140 degrees for a fan oven
Cream the vegan butter and sugar together, either using a wooden spoon or a stand mixer
Add the vanilla extract and the flour and mix until it forms a dough
Form the dough into a ball and place in a ziplock bag in the fridge for at least 30 minutes until it is firm
Flour your work surface and rolling pin and roll out your dough until it is about 5mm thick
Use a cookie cutter to cut out your biscuit shapes. Re-roll any spare dough until you have used it all
Place the biscuit shapes on a silicone baking sheet or greaseproof paper and put on the middle shelf in the oven for 10-12 minutes or just starting to brown at the edges. Keep an eye on them, you don't want them to over cook.
Leave to cool for a couple of minutes on the baking tray before moving to a wire rack to cool completely.
Mix 100g of sieved icing sugar with a couple of teaspoons of water until it reaches the correct consistency
Drizzle the icing over the biscuits and sprinkle with sprinkles. Leave to set.