01 - Preheat oven to 350°F (175°C). Grease and flour a 9x5-inch loaf pan or line with parchment paper.
02 - In a large bowl, cream the butter and sugar together until light and fluffy.
03 - Beat in eggs one at a time, mixing well after each addition.
04 - Stir in the milk, lemon juice, and lemon zest until combined. The mixture may look slightly curdled—this is normal.
05 - In a separate bowl, whisk together the flour, baking powder, salt, and poppy seeds.
06 - Gradually add the dry ingredients to the wet mixture, folding gently until just incorporated. Do not overmix.
07 - Pour the batter into the prepared loaf pan and smooth the top with a spatula.
08 - Bake for 35–40 minutes, or until a toothpick inserted into the center comes out clean.
09 - Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
10 - Whisk together the powdered sugar and lemon juice until smooth. Drizzle evenly over the cooled cake before serving.