1 cup butter, softened
1 cup brown sugar
1 cup granulated sugar
1 Tbs vanilla
1 tsp baking soda
1 tsp salt
Mix until smooth (I always use a wooden spoon instead of a mixer - a tip I got from rosemary Lyman), then add:
2 cups flour
Mix until consistency will allow you to shape dough into balls without it sticking in your hands, then add:
1 package chocolate chips
Shape into balls and place on a cookie sheet. Bake at 350 degrees for 10 minutes (or until cookies are just starting to brown).
Let cookies cool on the cookie sheet for a few minutes and then remove and continue to cool on the cooling rack.