0 a sweet food consisting of shortbread (= a sweet biscuit containing a lot of butter) then a layer of caramel (= a sticky brown food made from sugar, milk, and butter or cream ), and then a layer of chocolate:
a slice of millionaire's shortbread
The bakery makes traditional goods such as flapjacks, millionaire shortbread, and farmhouse loaves.
I love baking so much that I once skived work to make the ultimate millionaire's shortbread .
She wandered off chewing a large slice of millionaire's shortbread.
This recipe for millionaire shortbread came from my grandmother.