Preheat oven to 425F. Line a muffin pan with paper liners and set aside.
In a medium bowl, toss together the flour, poppy seeds, baking powder, baking soda, and salt. Set aside.
2 cups (250g) all purpose flour, 2 Tbsp poppyseeds, 2 tsp baking powder, 1/4 tsp baking soda, 1/2 tsp salt
In a large bowl, combine the sugar and lemon zest. Rub the mixture between your fingers to release the oil. The sugar will be pale yellow and very fragrant.
3/4 cup (150g) granulated sugar, zest of 2 lemons
Then whisk in the melted butter, eggs and sour cream.
1/2 cup (114g) unsalted butter , 2 large eggs, 1/2 cup sour cream
Whisk in the fresh lemon juice, milk, and vanilla extract.
1/4 cup fresh lemon juice, 1/4 cup (60ml) milk of choice, 1 tsp vanilla extract
Add the dry ingredients to the wet ingredients and mix together until just combined. Spoon the batter into the prepared muffin pan.
Bake at 425F for 5 minutes, then reduce the oven to 350F and bake for another 15 minutes or until a toothpick inserted into the center comes out clean.
Notes
Leftovers can be stored in an airtight container at room temperature for up to 4 days.