Vanilla Butter Biscuits

• 370 g plain flour, plus more to dust
• ½ tsp salt
• 250 g

Sift the flour and salt into a bowl and set aside. Cream together the butter and sugar in a large bowl, using a wooden spoon - or in a food mixer - until well combined and fluffy. Add the egg yolk and vanilla and mix it in well, then work in the flour. Once the mixture comes together as a dough, dust your hands with flour and wrap it in clingfilm. Chill for an hour (or up to a few days if more