Just a touch of cinnamon gives these crunchy and buttery cookies a surprising hint of spice.
Preheat oven to 375°F (190°C).
Beat butter with granulated sugar and brown sugar in a large bowl until well blended. Add eggs and vanilla; beat well.
Combine flour with baking soda, cinnamon and salt; gradually add to butter mixture, beating until well combined. Stir in oats and butterscotch chips; mix well. Drop by heaping teaspoons onto ungreased baking sheets.
Bake for 8 to 10 minutes or until golden brown. Cool slightly; transfer to a rack and cool completely.