Chocolate Chip Rectangle

This is a cookie-in-a-pan concoction. Doesn't make portion control any easier, but I made scaled down the recipe in the hopes that even if we consumed the whole pan in a day and a half, at least it wasn't twice as much! This also evolved from what I thought was half a bag of chocolate chips I found languishing in the cupboard. By the time I had the modest amount of cookie dough all mixed up and ready to accept the chips, I discovered it to be more like 2/3 of a bag, so the end result is a super chocolatey treat. I think the proportions are kind of nice, actually. And the texture on these beat the crispy hard little discs my butter laden drop cookies tend to be. In rectangle form it becomes a melty, flaky, chewy, gooey sensation.

1 stick unsalted butter, softened
1/4 c sugar
1/4 c dark brown sugar
1 egg
3/4 t vanilla
1 1/8 c flour
1/2 t baking soda
1/4 t salt
1/2 -2/3 package of semi-sweet chocolate chips

Preheat oven to 375. Butter (dimensions of pan) glass pan to prevent rectangle from sticking. In an electric mixer, cream the butter. Add the white and brown sugars and beat until fluffy. Beat in the egg. Then add the vanilla and beat until incorporated.
In a separate bowl, combine flour, baking soda and salt. Add the dry ingredients to the egg mixture and beat until incorporated. Lastly, fold the in chocolate chips. Spread dough into rectangular pan and bake for 30 minutes, or until golden brown.