Preheat oven to 375 degrees. Grease 2 - 9 inch round cake pans.
Add the flour, sugar, baking soda, and salt to a large bowl.
Add the water, oil, vinegar, and vanilla. Mix with a whisk until well-blended. Do not overbeat. It will still turn out even if there are a few small lumps.
Divide the batter between the 2 greased cake pans.
Bake on a middle rack of oven for 35 minutes or until an inserted toothpick comes out clean.
Recipe by Premeditated Leftovers™ at https://premeditatedleftovers.com/?p=31939