The lace pieces on the left side cake are many many cutouts decorated with royal icing. They are added to the cake working from either a real piece of lace or a good photo.
You don't want to use a stencil because this way is easier and more effective. These pieces are made ahead (like even a month ahead) and stuck on with soft icing at the last minute.
Use google to look for icing lace--you will find tutorials and many images that you can choose from. Then you need paper patterns or small cutters to make the shapes. Sorry but CC always blocks my favourite site regardless of how I spell it. Google "sugarcraft dolores" and you will get there.
where can i get lace moulds to mimic the cake on the left?
CK Products has some lace molds.
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