Pre-heat oven to 350F (180C). Grease and flour a round 8 inch cake pan or 9 inch bundt pan.
Sift the flour, sugar, baking powder and salt into a large bowl. Add the water, vegetable oil and vanilla, beat on medium speed until completely combined. Pour into the prepared cake pan and bake for about 40-45 minutes. Test for doneness with a toothpick, when it comes out dry or a few crumbs attached it's done. Let cool completely then dust with powdered sugar. Enjoy!
Notes
To make homemade cake/pastry flour - for every cup of all purpose flour, remove two tablespoons and replace with two tablespoons of corn starch. Be sure to sift the flour and cornstarch together a couple of times, this way it is sure to be properly combined and lump free. For room temperature remove from the fridge 45-60 minutes before using.This is easy cake be changed up by adding a tablespoon or so of lemon or orange zest, if you prefer or even some ground cinnamon or change up the flavoring from vanilla to almond, lemon or your favorite. Or why not add 1/4 cup of chocolate chips?The cake should be stored either in a covered cake dish or container. It will keep up to three days at room temperature. If you store it in the fridge, wrap it tightly to keep it from drying out. It will keep for up to 5-6 days in the fridge.Be sure to cool the cake completely then wrap it tightly in either plastic wrap or foil, place it in a freeze safe bag. The cake will keep for up to three months. When ready to thaw place the wrapped cake in the refrigerator to thaw then bring to room temperature before serving.