Chocolate Chocolate Chip Cookies

1 cup butter, softened

2 eggs

2 cups flour

3/4 tsp baking soda

1-1/2 cups white sugar

2 tsp vanilla extract

2/3 cup cocoa powder

2 cups chocolate chips

Preheat oven to 350. In large bowl, beat butter, sugar, eggs, and vanilla until light and fluffy. Stir together flour, cocoa, and baking soda. Add to butter mixture. Stir in chocolate chips. Drop by rounded teaspoonfuls onto ungreased cookie sheets. Bake for 8-10 minutes or just until set. Cool slightly, remove from cookie sheet to wire rack. Cook completely.