The other
thing they have in common is that «cookies» and «bars and squares» are casual desserts; the
type you take to bake sales,
picnics, potlucks, and other community events.
If you happen to like a particular
type of pie — strawberry - rhubarb happens to be my favorite — the last
thing you want is for everyone else at the
picnic to develop a taste for strawberry - rhubarb.