Microwave the butter till melted.
In a mixer, beat the butter with the sugars until creamy.
Add the vanilla and the egg.
Add the flour, baking soda, and salt.
Add the chips and chill 24 hours.
Scoop dough onto parchment lined cookie sheets.
Bake at 350 9-11 mins. (add the semi sweet chips during the last 2 minutes of baking)
Don't over bake them!