Egg Yolk Cookies
1.
Mix the whole egg and egg yolk together, add half of the sugar and beat with a whisk
2.
Stir until it changes color, add the remaining sugar
3.
Finally sent to light white, the volume increased by two times
4.
Add sifted low-gluten flour
5.
Quickly stir with a spatula
6.
Put in a piping bag
7.
. Squeeze the batter onto the cookie mold
8.
Put it in the oven, the upper tube is 160 degrees, the lower tube is 140 degrees, and bake for 25 minutes