Strawberry rings

Set oven to 180°C or gas mark 4. In a bowl, beat butter with sugar until creamy. Gradually beat in the egg, then the vanilla extract. Sift the remaining ingredients into a bowl and blend in with a spoon, then work by hand to form a soft dough. On a lightly floured surface, roll out the dough to 3mm thick. Using the 7cm (2¾in) fluted cutter, cut rounds from dough. Place on baking sheets. Remove centres from half of rounds with the 4cm (1½in) cutter. Re-knead and re-roll trimmings: cut out more rounds and rings, making sure that you have an equal number of each, to make 15-20 in total. Bake the biscuits in the oven for 15 mins until lightly browned, then remove from the oven and transfer the biscuits to wire racks. Leave them to cool. To assemble the biscuits, spread strawberry jam over the bases and place rings on top. Sift icing sugar over them before serving.