1. Heat oven to 375°F.
2. Beat butter, granulated sugar and brown sugar in large bowl until well blended. Add eggs and vanilla; beat well.
3. Combine flour, baking soda, cinnamon and salt; gradually add to butter mixture, beating until well blended. Stir in oats and butterscotch chips; mix well. Drop by heaping teaspoons onto ungreased cookie sheet.
4. Bake 8 to 10 minutes or until golden brown. Cool slightly; remove from cookie sheet to wire rack. Cool completely. Makes about 48 cookies.