For the Donuts:

1. Preheat the oven to 375°F and grease a donut pan.
2. In a large mixing bowl, mix the dry ingredients (flour, sugar, baking powder, baking soda, salt, and poppy seeds). Set aside.
3. In a medium mixing bowl, whisk the wet ingredients (butter, milk, lemon juice, vanilla extract) and lemon zest. Slowly add the wet ingredients to the dry ingredients and mix until well combined.
4. Use a spatula to transfer the batter to a piping bag, or a plastic baggie with the tip cut off. Pipe the batter into the donut mold until it is about 3/4ths of the way full.
5. Bake for 10-12 minutes or until the edges of the donuts are golden brown.
6. Remove the donuts from the oven and allow them to cool in the tray for 10 minutes before transferring to a cooling rack. Allow the donuts to fully cool before dipping in the lemon glaze.

For the Lemon Glaze

1. Add the lemon juice, 1 tablespoon of milk, and vanilla extract to a small mixing bowl. Stir to combine.
2. Whisk in the powdered sugar and add more milk until you get your desired consistency.
3. Dip each donut in the glaze and allow the glaze to set for 5 minutes.
4. Devour your donuts!