Double Chocolate Cookies

1 C. Butter, softened
2/3 C. Sugar
2/3 C. Brown sugar, packed
1 tsp. Vanilla
2 Eggs

2 C. Flour
3/4 C. Baking cocoa
1 tsp. Baking soda
1/2 tsp. Salt
1 3/4 c. Chocolate chips

Preheat oven to 350*.   Beat butter, sugars and vanilla in large owl until creamy.  Add eggs.  Add flour, cocoa, baking soda and salt.  Beat until blended.  Stir in Chocolate chips. Drop by rounded tablespoons onto greased baking sheets.  Bake for 9-10 minutes, cool on sheets and remove to wire racks to cool.  Yields 3 dozen cookies.