1. BEAT brown sugar, shortening and vanilla in large bowl at medium speed of electric mixer until well blended. Add eggs; beat well.
2. COMBINE flour, cocoa, salt and baking soda. Add to shortening mixture; beat at low speed just until blended. Stir in chocolate chips. Cover and chill 3 hours.
3. HEAT oven to 375 degrees F. Shape dough into 1 1/4-inch balls. Roll in granulated sugar, then in powdered sugar to coat completely. Place 2 inches apart on ungreased cookie sheet.
4. BAKE 8 to 10 minutes or until cookies are set. Cool 2 minutes on cookie sheet. Remove cookies to wire rack to cool completely.