Cinnamon Jumbles

1/2 cup margarine 

1 cup sugar

1 egg

3/4 cup buttermilk

1 teaspoon vanilla

2 cups flour

1/2 teaspoon salt

1/2 teaspoon baking soda

1/4 cup sugar

1 teaspoon cinnamon

In mixing bowl, cream margarine, sugar and egg thoroughly.  Stir in buttermilk and vanilla.  Add baking soda, flour and salt.  Mix well.  Chill dough.  Heat oven to 400 degrees.  Drop rounded teaspoonfuls of dough about 2 inches apart on lightly greased baking sheet.  Mix sugar and cinnamon and sprinkle over cookies.  Bake for 8 to 10 minutes or until set but not brown.