Chocolate Zucchini Cookies

1/2 c butter, softened
1/2 c white sugar
1/2 c brown sugar
1 egg
1 t vanilla
2 1/8 c flour
1/3 c cocoa
1 t baking soda
1/2 t salt
2 c shredded zucchini
chocolate chips, optional

Preheat oven to 350. Grease cookie sheets. In a medium bowl, cream together the butter, white sugar, and brown sugar until smooth. Beat in the egg and vanilla. Combine the flour, cocoa, baking soda, and salt. Gradually stir into the creamed mixture. Fold in the grated zucchini. Stir in chocolate chips if desired. Drop by rounded spoonfuls onto prepared cookie sheets. Bake 8-10 minutes in the preheated oven. Allow cookies to cool on baking sheet for 5 minutes before removing to a wire rack to cool completely.