Preheat the oven to 350°F.
In mixing bowl combine the flour, sugar, cocoa, baking soda, and salt, whisking well to insure all is blended.
Add the water, vanilla, oil, and vinegar, and mix on low-medium to combine, scraping down sides of bowl.
Bake at 350°F until a toothpick tests clean.
This recipe makes 1-8 inch round cake.
High Altitude Adjustments Increase flour by 1/4 cup. Bake cake at 325°F for 25 minutes.