Preheat oven to 350°F (175°C).

Sift together cake flour and baking powder.

Set the sifted dry ingredients aside.

In a large bowl, beat eggs until very thick and light (3-5 minutes).

Gradually add sugar to the eggs while beating.

Fold in the sifted dry ingredients until just blended.

In a separate small pan, combine milk, lemon juice, and vanilla extract.

Heat the milk mixture until hot but not boiling.

Gradually add the hot milk mixture to the batter.

Beat on low speed until smooth and well blended.

Grease and flour a 9x5x3-inch loaf pan.

Pour the batter into the prepared loaf pan.

Bake for 30-35 minutes.

Insert a toothpick into the center of the cake to check for doneness.

If the toothpick comes out clean or with only a few crumbs, the cake is done.

Remove the cake from the oven and let it cool in the pan for a few minutes.

Transfer the cake to a wire rack to cool completely before slicing and serving.