Pre-heat oven to 350 degree F
In a medium bowl, add cake flour, baking powder, baking soda, and salt. Stir together with whisk and set aside.
In the bowl of electric mixer, add eggs and beat for 10 seconds. Add sugar and continue to beat on medium speed fopr about 30 seconds.
Add vanilla extract and oil, keep beating.
Reduce mixer speed to low and slowly add about half of the flour mixture. Add milk, then the rest of dry ingredients.
Beat until just combined. Scrape down the bowl. The batter will be thin.
Pour the batter into a 6 inches round cake pan. If you want to make cupcakes, fill muffin pans bout 2/3 full.
Bake for 12-14 minutes. Test them with cake tester to check if they are done. (the tester should come out clean)
Frost as desire.