1 pkg. Duncan Hines pineapple supreme cake mix
1/4 c. oil
2 eggs
1/2 c. water
1 can (20-23 oz.) pineapple pie filling

Preheat oven to 350 degrees. Pour oil into a 13 x 9 x 2 inch pan, tilt pan to cover bottom. Put cake mix, eggs and water into pan; stir with a fork or spoon until blended (about 2 minutes). Scrape sides, spread batter evenly in pan.

Spoon pie filling onto batter; use a fork to fold into batter just enough to create a marbled effect. Bake for 35-45 minutes until toothpick inserted near center comes out clean.