Rum Bars 1 (18.25 ounce) box yellow butter cake mix 1 egg 1/2 cup (1 stick) butter, melted 1 (16 ounce) box confectioners' sugar 2 eggs 8 ounces cream cheese 1 teaspoon rum extract Mix together cake mix, 1 egg and butter. Pat out onto a 15 1/2 x 11-inch cake pan. Mix confectioners' sugar, 2 eggs, cream cheese and rum extract. Spread this mixture on top of cake mixture. Bake for 30 to 35 minutes at 350 degrees F. Cut into bars.