(Childhood memories) Egg yolk biscuits

Overview

I remember that this biscuit was one of my favorite snacks in my childhood. One bite would leave a sweet smell on your fingers.

Take two egg yolks and one whole egg and beat them
During the beating process, add sugar in three batches and beat until you can draw lines on the surface of the egg liquid.
Add the mixed flour and baking powder, stir evenly, do not stir for too long.
Use a piping bag to pipe out a round batter about 2cm in diameter on the baking sheet.
Bake in a preheated oven at 180 degrees for about 15 minutes, until the batter turns golden brown.