My mummy made me this with me when I was tiny, I remember it when Charles and Diana got married!
Preheat the oven to 180°C/350°F/Gas Mark 4.
Cream the butter and sugar together with an electric hand whisk. Whisk in the egg yolks and then slowly combine the flour until the mixture resembles fine breadcrumbs. Bring together with your hands to form a soft dough. Wrap in cling film and rest in fridge for 10 mins.
Roll the dough out between 2 sheets of baking parchment until the dough is the thickness of a pound coin.
Cut the dough into shapes with the large diamond cutter and cut out the middle of every other one with the smaller diamond. Gather together the off cuts and repeat.
Lay the shapes onto the baking tray and space evenly a thumbs width apart. Cover with cling film and chill in the fridge for at least 30 mins.
Bake in the middle of the oven for 8-10mins turning once until the biscuits are just beginning to colour. Remove from the oven and leave to cool on the tray then transfer to a wire rack.
Once cold sandwich together two biscuits with a generous tsp or strawberry jam.
Mix the royal icing to a piping consistency and pipe shapes onto the biscuits. Once the icing is hardened dab with a little icing and decorate with edible diamonds and gems or jelly sweets.
Please note: this recipe has been created and uploaded by a member of the Tesco Real Food online community. Tesco does not test customer recipes so cannot accept responsibility for the content, validate the results or answer queries regarding them.