Chocolate Chocolate-chip cookies

1 cup butter softened
1-1/2 cups white sugar
2 eggs
2 tsp. vanilla
Mix until light and fluffy
2 cups flour
2/3 cup cocoa powder
3/4 tsp. baking soda
1/4 tsp. salt
2 cups semi-sweet choc chips
Mix into the other mixture
Refrigerate dough for 2+ hours, form into balls, roll in sugar.
Bake at 350 for 7-8 minutes.