Chocolate Dump Cake/Wacky Cake

Some people mix this in the (ungreased) baking pan. I think it's a pretty fast, easy recipe even if you use a separate bowl, and I think the tiny additional effort is worthwhile.

3 cups flour
2 cups sugar
2 tsp baking soda
1 tsp salt
1/2 cup cocoa

3/4 cup oil
1 tsp vanilla
2 TBS vinegar
2 cups water

Combine dry ingredients. Add in wet ingredients, mix well, dump into greased 9x13 pan and bake for 40-50 minutes (or until done) at 350°F.