With the mixer on low-speed, add the eggs one at a time, add the vanilla extract and lemon juice. Beat on medium-high speed until combined.
With the mixer on low, add the flour and buttermilk alternately to the batter, beginning and ending with the flour.
Put the batter into the prepared loaf pan and bake for 45-55 minutes until the cake is golden brown and a toothpick inserted into the cake comes out clean with only a few moist crumbs.
Remove from the oven and allow to cool in the pan for about 15 minutes.