Pink Marbled Caramel Shortbread

"This is not just any ordinary Millionaire Caramel Shortbread, I’ve mixed dark, white and pink chocolate to make a beautiful marbling effect on top. The base is an easier version of shortbread from scratch, instead, I use crushed shortbread biscuits mixed with butter which is much quicker. I hope you’ll all join me in whipping up delicious squares of marbled chocolate caramel shortbread fit for a millionaire. This really does need to be tasted to be believed!"