STEP 1/12
[Cookie dough] Put butter in a bowl and whisk gently to add sugar.
STEP 2/12
Add the sifted flour and cocoa powder and mix.
STEP 3/12
Place the dough in a zipper bag, slide it flat, and rest in the freezer for about 30 minutes.
STEP 4/12
Put milk, water, butter, and salt in a pot and boil.
STEP 5/12
When the liquid boils, turn off the heat and add sifted powder and mix quickly.
STEP 6/12
When the powder is completely mixed, heat it again over medium-low heat, stirring the dough with a spatula, until a thin film forms on the bottom of the pot.
STEP 7/12
Transfer the dough to a bowl and stir in the beaten egg little by little.
STEP 8/12
Place the dough in a piping bag and squeeze it into a teflon-sheet pan into a certain size.
STEP 9/12
Spray water evenly with a water spray, put the cut cookie dough on top, put it in an oven preheated at 190 degrees, and bake it for 25 to 30 minutes.
STEP 10/12
[Coffee cream] Instant coffee is mixed with warm water to make coffee liquid.
STEP 11/12
Put whipped cream, coffee liquid, and condensed milk in a bowl and whip it with a hand mixer.
STEP 12/12
Fill the baked cookie sheet with coffee cream to complete.