Costa's Chocolate Caramel Shortbread Recipe Steal

If any of you have read my post from last year about my trip to England, you'll know I picked one of these up whenever we went to Costa. They've changed name but were once called Belgian Chocolate Shortbread Cake and they are amazing!

Apparently these are also called "Millionaire's Shortbread" over here but I don't prefer that name. Something about it reminds that they are rich....rich in calories. Regardless, they are probably my favourite dessert ever.