1 (18 1/4 oz.) pkg. spice cake mix
1 (14 oz.) can Eagle Brand sweetened condensed milk (not evaporated milk)
1/4 c. ReaLemon lemon juice from concentrate
2 med. all-purpose apples, pared, cored & finely chopped
1 (8 oz.) container Borden sour cream, room temperature
Ground cinnamon