Preheat oven to 375 degrees F.

In a large bowl, beat together butter, white sugar and brown sugar. Add the eggs and vanilla, beating well.

In a medium sized bowl, stir together the flour, baking soda, cinnamon and salt.

Gradually add the flour mixture to the butter mixture, stirring until blended.

Stir in oats and butterscotch chips.

Drop by rounded tablespoonfuls about 2 inches apart onto ungreased baking trays.