Pour oil into a 13 x 9 x 2-inch pan. Tilt pan to cover
Put cake mix, eggs and water into pan. Stir with a fork
or spoon until blended, about 2 minutes. Scrape sides of pan and spread batter
evenly. Spoon pie filling onto batter. Use a fork to fold into batter, just
enough to create a marbled effect.
Bake at 350 degrees F for 30 to 35 minutes. Insert wooden
pick into center. When it comes out clean, cake is done.
When cool, sprinkle confectioners' sugar on top, if desired.
Other pie fillings can be substituted, if preferred.