In a large bowl,, mix butter, sugar, brown sugar, and vanilla until creamy.

Add eggs to wet ingredients in large bowl and mix slightly. (If you over mix, it will change texture of cookie).

Spoon by round teaspoons full (or use a small cookie scoop) onto the ungreased baking sheet pan.

Bake @375° for 9 to 11 minutes depending on heat of your oven. Watch as they bake. They will seem too soft at first, but will continue to cook as they sit on the baking sheet. They firm up quickly as they cool. (Soft n Chewy is the goal)