01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or lightly grease.
02 - In a large bowl, whisk together flour, poppy seeds, baking powder, baking soda, and salt. Set aside.
03 - In another bowl, combine sugar and lemon zest. Rub together with fingers to release oils.
04 - Add eggs, yogurt, vegetable oil, lemon juice, and vanilla extract to the sugar mixture. Whisk until smooth.
05 - Pour wet ingredients into dry ingredients. Stir gently until just combined, avoiding overmixing.
06 - Divide batter evenly among muffin cups, filling each about 3/4 full.
07 - Bake for 18 to 20 minutes, or until a toothpick inserted in the center comes out clean.
08 - Cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.