Preheat oven to 375 degrees.
Cream butter and sugars, add eggs and vanilla, mix well. Then add dry ingredients and mix until just until combined. Fold in choc chips. Bake on ungreased cookie sheet for 8-10 minutes at 375 degrees.
As soon as these cookies have cooled, store in an airtight container to retain their softness. I usually put them in a gallon ziploc bag. Again. Nothin' fancy.