01 - Set oven to 375°F. Line a 12-cup muffin tin with paper liners or lightly grease each cup.
02 - In a large bowl, whisk together flour, poppy seeds, lemon zest, sugar, baking powder, baking soda, and salt until evenly mixed.
03 - In a separate bowl, whisk eggs, milk, melted butter, lemon juice, and vanilla extract until fully incorporated.
04 - Pour the wet mixture into the dry ingredients. Gently fold until just combined, avoiding overmixing to maintain muffin tenderness.
05 - Distribute batter evenly into muffin cups, filling each approximately three-quarters full.
06 - Bake for 16 to 18 minutes until a toothpick inserted in the center comes out clean.
07 - Allow muffins to rest in the tin for 5 minutes, then transfer to a cooling rack to cool completely.
08 - Whisk powdered sugar and lemon juice until smooth and pourable.
09 - Drizzle the lemon glaze evenly over the cooled muffins.