In large bowl, dissolve yeast in warm water. Add cocoa, 1/4 cup granulated sugar, the shortening, salt, egg and 1 cup of the flour. Beat with electric mixer on low speed 30 seconds, scraping bowl constantly. Beat on medium speed 2 minutes, scraping bowl occasionally. Stir in remaining flour until smooth. Scrape dough from side of bowl. Cover; let rise in warm place about 1 hour or until double in size.