Instructions:
Preheat your oven to 350°F (180°C) and grease a 9-inch cake pan.
In a large mixing bowl, whisk together the flour, sugar, baking soda, and salt.
In a separate bowl, mix together the water, oil, vinegar, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined.
Pour the batter into the prepared cake pan and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.