Dessert

Melt the vegetable oil and unsweetened chocolate in an 8-inch (20 cm) square pan in a 350°F oven; add cream cheese or sour cream if desired.
Add the remaining ingredients (except chocolate chips and nuts) to the pan.
Beat the mixture with a fork until smooth and creamy (about 2 minutes).
Scrape the sides of the pan and spread the batter evenly in the pan.
Sprinkle the batter with semi-sweet chocolate pieces and chopped nuts (optionally fold them in slightly).
Bake at 350°F for 30 to 40 minutes, until a toothpick in the center comes out clean.
Cool in the pan and serve hot or cooled.
This recipe is adapted from Wikibooks. It is licensed under Creative Commons Attribution-ShareAlike 4.0 International.