Preheat your oven to 350℉.
Beat the eggs with the sugars until frothy.
Mix in the flour, vanilla extract, baking powder, lemon zest, and butter, and combine everything well.
Spray the donut pan with baking oil spray.
Fill the dough with the medium cookie scoop, leaving a little of space at the top of the pan.
Place in the preheated oven and bake on the middle rack for about 12 - 15 minutes.
Test if the donuts are baked through with a toothpick. If no batter sticks to it, they are done.
Let them cool on a cooling rack.