Millionaire Shortbread: Like a homemade version of a Twix candy bar

So much to my husband's delight I decided to do a dessert week and focus on pleasing that sweet tooth.  While I do occasionally love sweet things my desire for them has never been altogether that strong, while my husband Chris, would eat cake and chocolate biscuits every day if he could. So on the occasions that I decide to do some baking I love to make it worth every bite.  And being that we are back living in England I decided to do something a little more British this time. Millionaire Shortbread is a popular British shortbread that consists of three layers, shortbread, caramel and melted chocolate, it is more like a candy bar then a bar. This recipe is my mother-in-law's.