easy sponge cake

add in a mixer bowl eggs and attach bowl and flat beater to mixer. turn on to speed 6 about 5 minute . and and slowly slowly add sugar and vanilla . continueing on speed 6 about 5 minute . stop and scrape bowl . add slowly slowly all purpose flour . and scrape bowl. pour batter into grease and floured 8×9-inch round baking pan bake at 335°f for 30 minutes