First, prepare the milk and sugar mixture. In a glass, combine the milk with 1 tablespoon of lemon juice and mix well. Set aside for about 10 minutes until the milk thickens.
In a bowl, mix together the powdered sugar with lemon zest and vanilla extract. Set aside, similar to the milk mixture, for about 10 minutes.
In a medium bowl, sift together the all-purpose flour, baking powder and salt. Set aside.
Using a hand mixer or stand mixer on medium speed, cream together the softened butter and the sugar mixture until smooth, light and fluffy.
Add the eggs, one at a time, mixing well after each addition until the mixture is fluffy and creamy.
Gradually add half of the flour mixture, half of the milk mixture, and the remaining lemon juice, mixing until just combined. Be careful not to overmix.
Add the remaining flour and milk mixture and mix until the batter is smooth and well combined.
Pour the batter into a greased and floured loaf pan and bake in a preheated oven at 180°C (350°F) for about 45-50 minutes, or until a toothpick inserted into the centre comes out clean.
Once baked, remove the loaf from the oven and let it cool in the pan for 5 minutes before transferring it to a wire rack to cool completely.
For the decoration, mix the powdered sugar with lemon juice until you get a thick and consistent glaze. Drizzle the glaze over the cooled loaf and sprinkle with additional lemon zest if desired.
Allow the glaze to set before slicing and serving. Enjoy your lemon loaf cake!
Happy baking!