Caramel shortbread

Caramel shortbread, also known as caramel squares, caramel slice, millionaire's shortbread, millionaire's slice, chocolate caramel shortbread, or Wellington squares is a biscuit confectionery composed of a shortbread biscuit base topped with caramel and milk chocolate. Variations exist which substitute or add ingredients to cater to different tastes, dietary requirements or ingredient availability. Caramel shortbread is an adapted form of the original Scottish shortbread. Scottish shortbread originated around the 12th century, but its modern refined form is attributed to the efforts of Mary, Queen of Scots in the 16th century.

Source: Wikipedia