01 - Preheat the oven to 375°F. Line a 12-cup muffin tin with paper liners or grease lightly.
02 - In a large bowl, whisk together the flour, poppy seeds, baking powder, baking soda, and salt.
03 - Rub lemon zest into the sugar to release oils. Whisk in the eggs, Greek yogurt, melted butter, lemon juice, and vanilla extract until smooth.
04 - Fold the wet mixture into the dry ingredients gently until just combined, avoiding overmixing.
05 - Divide the batter evenly among prepared muffin cups, filling each about three-quarters full.
06 - Bake for 18 to 20 minutes or until a toothpick inserted into the center comes out clean.
07 - Allow the muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
08 - Whisk powdered sugar with lemon juice until smooth and pourable. Drizzle over cooled muffins and let the glaze set before serving.