Should butter be soft or cold for shortbread?
Start with butter that's refrigerator-cold to prevent the dough from warming up too fast, which would make it greasy and difficult to roll. If the dough does get soft or sticky as you're rolling or cutting it, just put it in the refrigerator for 10 or 15 minutes to chill the butter.
Can you put shortbread in the fridge to cool?
Cool rapidly by placing the shortbread tin in the fridge. For the caramel: Whilst the shortbread is cooling measure the butter, sugar and condensed milk into a pan and heat gently until the sugar has dissolved. ... Store in a cool dry place or the fridge in an airtight container and eat within 2 weeks.