A date square is a Canadiandessert or bar cookie made of cooked dates with an oatmeal crumb topping. In Ohio it is known as matrimonial cake. In Eastern Canada it can also be known as date crumbles. However, a brief poll indicates most Canadians are completely unaware of this. It is often found in coffee shops as a sweet snack food. Sometimes nuts are added to the base layer or crumb topping, or other alterations. There can also be candied peel added to the date stuffing for a contrasting texture.