01 - Preheat oven to 350°F. Grease and line a 9x5-inch loaf pan with parchment paper.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl until evenly mixed.
03 - Beat softened butter and granulated sugar in a large bowl until light and fluffy.
04 - Add eggs one at a time, mixing thoroughly after each addition.
05 - Mix in lemon zest, fresh lemon juice, and vanilla extract until evenly blended.
06 - Alternately add the flour mixture and milk to the wet ingredients, starting and ending with flour. Mix gently until just combined to avoid overmixing.
07 - Pour batter into the prepared loaf pan and smooth the surface evenly.
08 - Bake for 45 to 55 minutes or until a toothpick inserted into the center comes out clean.
09 - Allow loaf to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
10 - Whisk powdered sugar and lemon juice together until smooth and pourable. Drizzle over the cooled bread.
11 - Let the glaze set before slicing and serving.