Marbled Angel Food Cake
["1 box angel food cake mix", "1/4 c. Hershey cocoa"]
["Preheat oven to 375\u00b0.", "Prepare cake according to package directions.", "Measure 4 cups of batter into separate bowl. Gradually, fold cocoa into batter until well blended, be careful not to deflate batter.", "Alternately pour vanilla and chocolate batters into ungreased tube pan.", "Cut through batter with knife to marble batter.", "Bake 30 to 35 minutes, do not underbake.", "Invert pan on heatproof funnel or bottle.", "Cool for 2 hours.", "Run knife along sides to loosen cake, place on platter.", "May be eaten plain or drizzled with chocolate glaze."]
["angel food cake mix", "cocoa"]