Prepare the dough: Mix 1 kg flour with 500 g animal ghee, 1 large spoon powdered milk, 1 small spoon mahlab (optional), 150 g sugar, and 200 g water. Knead until the dough becomes soft and light in color.
Rest the dough: Place the dough in the refrigerator and let it rest overnight or until the next day.
Prepare the syrup: Make syrup by boiling 2 measures sugar with 1 measure water and adding a small amount of lemon juice. Stir until sugar dissolves completely.
Mix syrup into dough: Bring the dough to room temperature. Gradually add the syrup to the dough while mixing at low speed with a mixer until fully absorbed. Cover and refrigerate for 30 minutes.
Prepare the filling: Mix pistachios with 1 spoon powdered sugar and about half a cup of syrup. Add a spoon of Arabic ghee to soften the mixture.
Shape the Maamoul: Take small balls of dough, flatten them, place a ball of pistachio filling inside, and close the dough around it. Shape by hand without a mold, forming a light rotation to seal.
Bake: Bake the shaped Maamoul in a preheated oven (temperature and time not specified, typically 180°C for 20-25 minutes) until golden and fragrant.