01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with parchment paper for easy removal.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
03 - In a large bowl, cream butter and sugar together until light and fluffy, approximately 2–3 minutes.
04 - Beat in eggs one at a time, then mix in lemon zest, lemon juice, milk, and vanilla extract until well combined.
05 - Gradually add dry ingredients to wet ingredients, mixing just until incorporated. Do not overmix.
06 - Pour batter into prepared loaf pan and smooth the top surface.
07 - Bake for 45–55 minutes, or until a toothpick inserted into the center comes out clean.
08 - Cool in pan for 10 minutes, then remove loaf and transfer to a wire rack to cool completely.
09 - Whisk together powdered sugar and lemon juice until smooth and pourable.
10 - Drizzle glaze over cooled loaf. Slice and serve.