Place all the ingredients in a bowl and knead very well with your hand. You can also use a cake stand mixer, using a flat cake attachment or dough attachment. Mix slowly until they are well incorporated together. Cover and let the dough rest for 2 hours. While you wait for the dough to rest, prepare the filling by mixing the ingredients together.
Once the time is up, form the dough into ball portions and cover them to prevent drying.
Press a piece of the dough into a flat shape, then add a tablespoon of pistachio filling in the middle and wrap the dough around it to cover the filling completely.
Press the ball shaped dough well into the mold and the tap the mold on the counter so it falls out.
Once that part is done, lay the pieces on a sheet pan with parchment paper or a non-stick pan until you finish the rest of the balls.
Bake in a preheated 400 degree oven for 20 minutes. Remove from the oven and let it cool on room temperature.
Dust with sugar and store in an air tight container.