So I created this cake today. I took a Duncan Heinz white cake mix and followed the directions on the box but added white chocolate instant pudding mix and 3 whole eggs instead of egg white. I took out half the batter and poured into my 9" round pans. Then added unsweetened chocolate powder from Penzey's and mixed with the remaining batter. I then spooned on top of white batter and swirled in. I baked at 325 for 28 minutes. I melted semi-sweet chocolate chips with a pat of butter and spread on the 1st layer. I then whipped 2 cups of cream, added 1/3 cup unsweetened chocolate powder from Penzey's, powdered sugar to taste, vanilla and melted knox gelatin with 1 T hot water. spread generously on cake. Voila-very moist beautiful marbled cake for that sweet tooth fix.
