Preheat the oven to 350 F.
Prepare a 9-inch spring form pan.
Sift the flour and set aside.
Place the eggs, sugar, and vanilla in a stand mixer fitted with a whisk attachment.
Beat on high speed for 10-12 minutes.
Turn off the mixer and lightly sprinkle half the flour over the top.
Gently fold the flour in by hand. Repeat with remaining flour.
Pour cake batter into the prepared pan.
Bake for 15 -20 minutes.
Cool the sponge cake in the pan before unmolding and placing it on a wire rack.