What you’ll need:
1/2tsp vanilla essence
275g self raising flour
Preheat your oven to 180°c/160°c fan/gas mark 4 and line a couple of baking trays. Beat the butter, sugar and essence together until your mixture is pale and creamy. Whisk in the egg and sift over the flour. Mix until you have a nice dough to work with.
Roll out the dough and cut into 32 circles using a 6cm cutter, then using a 3cm cutter, stamp out the centre half of your circles. Bake for 12-14 minutes. To assemble, spread 1tsp of jam or marmalade on each whole biscuit. Place a cut out biscuit on top and sandwich together.