Chocolate Chocolate Chip Cookies

1 cup butter, softened
3/4 cups white sugar
3/4 cups brown sugar
2 eggs
2 teaspoons vanilla extract
2 cups all-purpose flour
2/3 cup cocoa powder
3/4 teaspoon baking soda
1/4 teaspoon salt
2 cups semisweet chocolate chips
2 cups chopped walnuts

Directions

1. Preheat oven to 350F.
2. In large bowl, beat butter, sugars, eggs, and vanilla until light and fluffy. Combine the flour, cocoa, baking soda, and salt; stir into the butter mixture until well blended. Mix in the chocolate chips and walnuts. Drop by rounded teaspoonfuls onto ungreased cookie sheets.
3. Bake for 8 to 10 minutes in the preheated oven, or just until set. Cool slightly on the cookie sheets before transferring to wire racks to cool completely.