Preheat oven to 350 F
Beat the eggs in a stand mixer at medium speed, slowly adding the sugar. Continue beating for about 10-15 minutes. When you are ready for the next step, this mixture will have a creamy texture, almost like whipped cream.
Remove the bowl from the stand mixer, and slowly fold in the first part of the sifted flour and slow mix by hand with a whisk until the flour is incorporated. Repeat with the remaining two parts of the flour.
Add the vanilla and oil and stir slowly with a spatula until completely incorporated.
Add the batter to your cake pan of choice. This amount will fit into two 8 inch circle pans, or one 9 x 13.
Bake for 35 minutes, or until a toothpick comes out clean.
Remove from oven and let cool until completely cooled.
Poke small holes along the surface of the sponge cake.