Pastéis de Nata, also known as Portuguese custard tarts, are a beloved Portuguese pastry. They consist of a flaky pastry shell filled with a creamy custard made from eggs, sugar, milk, and vanilla. The tarts are baked until the custard is set and the pastry is golden brown. Pastéis de Nata are best enjoyed warm, sprinkled with powdered sugar and cinnamon. They are a sweet and delicious treat that can be found in bakeries throughout Portugal.