Preheat the oven to 175°C (347°F).
Soften the butter at room temperature until creamy.
Add the sugar and mix until the mixture becomes creamy.
Add the eggs one at a time, mixing well after each addition.
Sift in the cake flour, baking powder, and salt and mix until just combined.
Add the milk, lemon juice, and lemon zest, mixing until evenly incorporated.
Pour the batter into a pound cake pan.
Bake in the 175°C oven for 35~40 minutes.
Once cooled, add lemon glaze on top if desired.