In a large bowl, cream together the butter, white sugar, and brown sugar. Beat in the egg, then stir in the vanilla. Combine the flour, baking soda, and salt; stir into the creamed mixture. Mix in the oats.
Drop dough by rounded teaspoonfuls onto ungreased cookie sheets.
Bake for 8 to 10 minutes in the preheated oven, or until golden brown.
Allow cookies to cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Interesting Facts
Oats are a type of cereal grain, and are the most nutritious of all grains.
Oatmeal cookies are one of the most popular types of cookie in the United States.
Oatmeal cookies are a great source of fiber and protein.