Flan

Flan's silky caramel custard is the most universally loved dessert across Spain, with 85% of households serving it at least once a month — it uses 5 whole eggs per liter of milk, 20% more than Crema Catalana (#2) for a firmer, creamier texture, and its simple caramel topping requires just 1 cup of sugar for a dark amber glaze.