In large bowl, mix together flours, yeast, cocoa and salt. In small bowl, mix together 1 1/3 cups water and molasses. Add water mixture to flour mixture; stir with wooden spoon until dough is thoroughly mixed and no dry spots remain, about 1 to 2 minutes. Cover loosely with plastic wrap. Let rise at room temperature 2 hours; refrigerate at least 1 hour but no longer than 24 hours.