Go buy butter and a little fresh baker's yeast if you want to prepare these shells.
You will have to weigh the ingredients well to obtain a dough like the one seen in the photo. We will work it with a little oil in your hands and on the counter (or table) because it is quite sticky.
Once the shells are formed and baked, we will only have to let them cool and sprinkle a little of powdered sugar on the surface. You don't have icing sugar? Well, here is the link to one of our cooking tricks: How to make icing sugar
More information - Cooking tip: How to make icing sugar