Banana Chocolate Chip Cookies

As I was searching my cookie recipes last night, I couldn't believe that I hadn't posted this recipe before.  These cookies are THE cookie around our house.  If we are going to make cookies, these are the ones we make.  I have a fond attachment to them and joke that this is the cookie that hooked Jonathan to me for life, as I would send them to him in college care packages when we were dating.
Needless to say they are fantastically delcious and don't last long in our home.  They are based on an old Mrs. Field's recipe, using a few of my own adjustments.  Enjoy!

2 2/3 cups all purpose flour
1/2 tsp baking soda
1/4 tsp salt
1 cup packed light brown sugar
1/2 cup granulated sugar
1 cup salted butter, softened (the trick to a really good cookie is using real butter, not margarine)
1 egg
1 tsp vanilla
3/4 cup mashed banana (about 1 banana)
2 cups chocolate chips

Preheat the oven to 300*F.  In a medium bowl mix together the flour, baking soda and salt - set aside.  In a large bowl blend the sugars together.  Add butter and mix to make a grainy paste.  Add the egg, vanilla, and banana and mix.  Add the flour mixture and the chocolate chips.  Blend until combined - don't over mix.  Drop by tablespoons onto a cookie sheet (sprayed with non-stick cooking spray).  Bake 20-25 minutes.  Transfer to a cool surface to cool down.  Enjoy with a glass of milk on the side!