Combine butter, margarine and cream cheese. Add sugar and beat ... Add flour 1 cup at a time. Beat well. ... a toothpick. Cool cake in pan 25 minutes before trying to remove it.
Preheat oven to 350°F. In ... electric mixer, combine cake mix, 1 egg, butter, 1 ... bowl, beat cream cheese until fluffy. Gradually beat in ... refrigerator. Makes 48 bars.