Cream together butter and sugars for 5 minutes.
Add vanilla and then eggs, one at a time, beating until incorporated.
Stir together flour, baking soda and salt. Add to butter mixture and mix until combined.
Fold in chocolate chips.
Chill dough for at least 1 hour, but up to a couple of days.
Preheat oven to 375°F.
Drop in large tablespoons full (or use a small cookie scoop) onto baking sheet, leaving a couple of inches between cookies.
Bake for 10-12 minutes. Cool for 5 minutes on cookie sheet and then remove to wire rack to cool completely.
