i was looking at shortbread pans with patterns on and i was surprised at how expensive they were so i made my own stamp
you will need some craft foam and some acetate (over head projector paper/ or you could use foam i wanted it to be clear so i could see if it was central)
then you can cut the shape you want and stick it on to the clear acetate and then stamp it on. if you have a die cutter than you can use that to cut it, i have a silhouette so it doesn’t cut foam all the way through, i tried it with the blade on setting 10 and thickness 33 and it only cut half way through, which was fine as then i had a guide for me to cut my self by hand, but if you are good with a cutting blade then you can just draw it straight on to the foam and cut it by hand.

shortbread recipe
15og butter
85g caster sugar
1 tsp vanilla extract
225g plain flour
(if you want rose flavoured shortbread add a teaspoon of rose water)
and if you want to sprinkle crystallised rose petals on top then brush rose petals with an egg white and tip in sugar and leave to harden

preheat the oven at 180c /350f
butter a round fluted tart tin. in a bowl whisk butter and sugar until soft, then add the vanilla (rose water if you want rose shortbread) mix until puffy and pale then add the flour and stir in with a spatula until combined, then press the dough mixture into your tin and poke holes into so it doesn’t rise then stamp it with the stamp you made and put in in the oven for 25 minutes,