Preheat oven to 300° and grease a 9×5 inch loaf pan. Set aside.
In a medium bowl, whisk flour, baking powder and salt together. Set aside.
In a large bowl, beat butter and sugar together until light and fluffy.
Add lemon juice, lemon zest and milk. Beat until smooth.
Add dry ingredients into wet ingredients and beat until combined.
Beat eggs one at a time into batter and beat well after each addition.
Lastly, pour batter into prepared baking pan.
Bake for 1 hour and 20 minutes or until a toothpick inserted in the center comes out clean and the top springs back with lightly touched.
Carefully remove from oven and run a knife along the edges.
Let cool on a wire rack.