Preheat oven to 350 degrees F.

Line baking sheet with parchment paper and set aside.

In large bowl, combine sugar and lemon zest.

Rub the zest into the sugar with your fingers to release the oils, until thoroughly mixed.

In large bowl, combine sugar/lemon zest mixture with flour, baking powder, salt, and poppy seeds.

Cut butter into flour mixture. Set aside.

In small bowl, combine 2 eggs, buttermilk, lemon juice, and vanilla.

Whisk until combined.

Make a well in center of flour mixture and pour in egg mixture.

Stir with wooden spoon until it comes together.

Turn dough out on a lightly floured counter and knead a few times until it holds its shape. Divide into two equal portions(if halving the recipe, you don't need to do this).

Roll each portion into an 8-9" circle (I eyeballed it).

Cut each circle into 6 or 8 triangles and place the triangles on prepared baking sheet.

To make egg wash, combine additional egg in a small bowl with 1 tablespoon of water and whisk to combine.

Lightly brush the triangles with the egg wash and bake in preheated oven for 18-22 minutes, or until lightly golden and cooked through.

Mine were done right at 20 minutes.

Cool on a wire rack until cool enough to handle/eat without burning your mouth.

Enjoy!