These molds are handmade in Northern Portugal out of galvanized steel and are the same ones used by professional bakeries throughout Portugal to make the famous Portuguese custard tarts (Pastéis de Nata). If you fell in love with the irresistibly creamy custard tarts that you had in Portugal and wish to recreate them at home, using the tins that were made for Pastel de Nata will give you a much better result than using muffin tins or silicone molds.
