In a large bowl, cream together the butter and sugars.
Add egg, vanilla, baking soda, salt, and flour; beat to combine.
Gently fold in oatmeal and chocolate chips. Using a cookie scoop (I used a 1 tablespoon size) put the dough onto an ungreased cookie sheet. Slightly flatten the dough.
Bake at 375°F for 10 minutes or until golden brown