Preheat oven to 300*f.

In a medium bowl, combine flour, soda and salt.

Mix well and set aside.

In a large bowl with an exlectric mixer, blend sugars at medium speed.

Add butter and mix to form a grainy paste, scraping down the sides of the bowl.

Add egg, liqueur and banana, and beat at medium speed until smooth.

Add the flour mixture, 1 cup of the chocolate chips and the walnuts and blend at low speed until just combined.

Drop by rounded tablespoons onto ungreased cookie sheets, 2 inches apart.

Sprinkle cookies with chocolate chips, 6 to 8 per cookie.

Bake 25-27 minutes until cookie edges begin to brown.

Transfer immediately to a cool surface.