200g unsalted butter, softened
200g golden caster sugar
1 egg
1 tsp vanilla extract
400g plain flour, plus extra for dusting
Put the butter in a bowl and beat using electric beaters until soft and creamy. Beat in the sugar, then the egg and vanilla, and finally the flour. If the dough feels sticky, add a little more flour and knead it in. Bring together into a ball and continue with your chosen biscuit recipe.