01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease each cavity.
02 - In a large mixing bowl, whisk together the flour, granulated sugar, poppyseeds, baking powder, baking soda, and salt until fully blended.
03 - In a separate bowl, whisk ricotta cheese, eggs, melted butter, milk, lemon juice, lemon zest, and vanilla extract until smooth and homogenous.
04 - Add wet ingredients to the dry mixture. Gently fold using a spatula until just combined, avoiding overmixing.
05 - Divide the batter evenly among the prepared muffin cups, filling each about three-quarters full.
06 - Bake for 18 to 22 minutes or until a toothpick inserted in the center comes out clean and tops are lightly golden.
07 - Remove tin from oven and let muffins cool for 5 minutes before transferring to a wire rack to cool completely.