1/2 cup butter
1 cup packed brown sugar
1/2 cup white sugar
1 egg
1 teaspoon vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup unsweetened cocoa powder
1/2 cup butter, softened
1 cup semisweet chocolate chips
1/2 cup chopped walnuts
Preheat oven to 350 degrees F (175 degrees C). Grease cookie sheets.
In a medium bowl, cream together the butter, brown sugar and white sugar until smooth. Beat in the egg and vanilla. Combine the flour, baking soda and salt; stir into the creamed mixture. Finally, stir in the chocolate chips and walnuts. Drop dough by rounded spoonfuls onto the prepared cookie sheets.
Bake for 12 to 15 minutes in the preheated oven, until a toothpick inserted comes out clean. Allow cookies to cool on baking sheet for 5 minutes before removing to wire racks to cool completely.