Preheat oven to 400°F (200°C).
In a large bowl, mix flour, sugar, baking powder, salt, and poppy seeds.
Cut in the cold butter until the mixture resembles coarse crumbs.
In another bowl, whisk eggs, milk, lemon zest, and vanilla extract.
Add wet ingredients to dry ingredients and mix until just combined.
Turn dough onto a floured surface and knead gently.
Pat dough into a circle about 1-inch thick and cut into 8 wedges.
Place wedges on a baking sheet lined with parchment paper.
Bake for 18-20 minutes or until golden brown.