This is also known as Wacky Cake or Depression Cake. I love it. My Mom and I used to make it together when I was a kid. Now there are all different flavors.

Chocolate Crazy Cake (No Eggs, Milk, or Butter)

FOR THE CAKE:
Dry Ingredients:
1 ½ cups all-purpose flour
3 Tablespoons unsweetened cocoa powder
1 cup granulated sugar
1 teaspoon baking soda
½ teaspoon salt
Wet Ingredients:
1 teaspoon white vinegar
1 teaspoon vanilla extract
5 Tablespoons vegetable oil
1 cup water

Optional Toppings: (use your favorite topping for chocolate cake)
powdered sugar
favorite frosting

For the cake:
Preheat oven to 350 degrees F. Spray an 8-inch square pan with nonstick cooking spray.
Mix first 5 dry ingredients in the prepared pan (flour, cocoa powder, sugar, baking soda and salt.)

Make 3 depressions in the dry ingredients – two small, one larger.

Pour vinegar in one of the smaller depressions. Pour the vanilla extract in the other smaller depression and the vegetable oil in the third larger depression.

Pour water over all. Mix well until smooth.

Bake on the middle rack of the oven for 35 minutes. Check with toothpick to make sure it comes out clean. Note: Oven baking times may vary, be sure to check your cake to make sure you do not over bake.

Cool completely before frosting (if using). You can also just sprinkle with a dusting of powdered sugar.

Store frosted cake in the refrigerator. Unfrosted cake doesn't need refrigerated.

Notes:
If you don’t want to mix this in the baking dish, you can combine all the ingredients in a bowl, then pour the batter in to a greased 8-inch square baking dish.

You can sub vegetable oil with canola oil

You can sub white vinegar with apple cider vinegar.