Step 1: Preheat your oven to 350°F (175°C). Lightly grease and flour a standard loaf pan (8.5 x 4.5 inches or 9 x 5 inches).
Step 2: In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, and salt. Make a well in the center of the dry ingredients.
Step 3: In a separate bowl, whisk together the eggs, milk, melted butter, ¼ cup lemon juice, and lemon zest.
Step 4: Pour the wet ingredients into the well of the dry ingredients. Stir gently with a spoon or spatula just until combined. Be careful not to overmix; a few lumps are fine.
Step 5: Pour the batter evenly into the prepared loaf pan. Bake for 50-60 minutes, or until a wooden skewer or toothpick inserted into the center comes out clean.
Step 6: While the bread is baking, prepare the glaze. In a medium bowl, whisk together the powdered sugar, 3 tablespoons fresh lemon juice, and 2 tablespoons melted butter until smooth. If the glaze is too thick, add a tiny bit more lemon juice; if too thin, add a little more powdered sugar.
Step 7: Once the bread is baked, remove it from the oven and let it cool in the pan for 5-10 minutes. While still warm, slowly pour the prepared glaze evenly over the top of the bread. The warm bread will absorb the glaze, making it incredibly moist.
Step 8: Allow the bread to cool completely in the pan before carefully removing it and slicing. Enjoy!