Preheat & Prepare Pan: Preheat oven to 350°F (175°C). Line an 8.5x4.5-inch loaf pan with parchment and lightly grease.
Mix Wet Ingredients: Cream butter and sugar until light and fluffy. Add eggs one at a time, then mix in lemon zest, juice, and milk.
Add Dry Ingredients: In a separate bowl, whisk flour, baking powder, and salt. Slowly mix into wet ingredients just until combined.
Bake: Pour batter into pan and bake for 45–55 minutes or until a toothpick comes out clean.
Make Lemon Syrup: While cake bakes, simmer lemon juice and sugar until sugar dissolves. Set aside.
Soak & Cool: Once baked, poke holes in the warm cake with a skewer. Slowly spoon lemon syrup over the top. Cool completely.
Glaze: Mix powdered sugar with lemon juice to make a pourable glaze. Drizzle over cooled cake and let set.