I found this delicious and easy recipe in one of my handwritten recipe boxes, though of course it is a clipping. Yum!
1 package Betty Crocker devil’s food cake mix
1 package (4 1/2 oz.) chocolate instant pudding and pie filling
1 package (6 oz.) semisweet chocolate chips
1 1/4 cups water
1/4 cup vegetable oil
Heat oven to 350F. Mix all ingredients in ungreased oblong pan, 13x9x2 inches, with fork, scraping corners frequently, until moistened. Stir batter vigorously with fork 1 minute; scrape sides with rubber spatula. Spread batter evenly in pan. Bake until top springs back when touched lightly in center, 40 to 55 minutes; cool. Loosen cake from sides; cut and serve directly from pan. Store any remaining cake loosely covered in refrigerator. (like there would be any)