This recipe is from Delia's Happy Christmas. Makes 24 (18 if using 1lb/450g mincemeat). Scroll to the bottom of the Method to see questions Lindsey has answered on this recipe Make up the pastry by ...
4. Place the buttercream in a piping bag or spread on half with a knife. Sandwich the biscuits together. Leave in a cool place until ready to serve, or refrigerate until needed.