A very fudgy and moist cake that’s great for a crowd because it doesn’t dry out quickly. Serve with frosting, whipped cream, or ice cream.
Preheat the oven to 350 degrees F. Grease an 18-inch by 26-inch sheet pan.
In a large bowl, combine the water, oil, vinegar, and vanilla. Mix well. In a separate bowl, whisk together the flour, cocoa, sugar, soda, baking powder, and salt. Add the dry ingredients to the wet and mix until smooth. Pour into the prepared pan.
Bake for approximately 45 minutes or until a tester inserted near the center comes out clean. Cool in the pan.