The recipe for cookies is as follows: Ingredients: 200 grams of low-gluten flour, 130 grams of butter, 35 grams of fine sugar, 65 grams of powdered sugar, 50 grams of eggs, 1/4 tsp of vanilla extract.

Method: 1. Cut the butter into small pieces and soften at room temperature.

2. Beat with a whisk until smooth.

3. Add powdered sugar and caster sugar one at a time.

4. Continue beating until smooth.

5. Add eggs in 3 batches and continue beating.

6. Beat the butter until it turns white and slightly increases in volume.

7. Sift in the flour one at a time.

8. Mix flour and butter paste evenly.

9. Put half of the batter into a piping bag.

10. Pour onto a baking sheet lined with foil.

11. Add a tablespoon of cocoa powder to the other half of the batter.

12. Mix well to form cocoa batter.

13. Put the cocoa batter into a piping bag and pipe it onto the baking sheet.

Baking: Preheat the oven to 200 degrees and bake at 180 degrees for about 5 minutes. After coloring and setting, change to 160 degrees for another 5 minutes.

(Please adjust the time and temperature appropriately according to the temperament of your oven).