Entry-level for beginners: the simpler, the more classic---cocoa cookies

Overview

I will give you a simple novice tutorial. It feels good to watch the delicious food in your hands. Share it.

Mix cake flour and cocoa powder and sift twice.
Cut butter into small pieces and soften at room temperature.
Add powdered sugar and vanilla sugar and beat with an electric mixer until the color turns white and the volume increases.
Add the egg liquid in three batches and mix well.
Sift in the flour and mix until the dry powder disappears to form a cookie batter.
Put the cookie batter into a piping bag and pipe out a serpentine curve on the parchment paper.

$Entry-level for beginners: the simpler, the more classic---cocoa cookies step 6$
In the middle rack of the oven, set it to 180 degrees and it will take about 12 minutes to bake.