Learn how to make delicious Spanish croquettes with serrano ham. This is the perfect appetizer, crunchy outside and creamy inside. Croquettes are one of the most common tapas in Spain.br br ▼ INGREDIENTS LIST:br br - 1 litre (32 oz) of milkbr - 105 g (3.7 oz) of flourbr - 80 g (2.8 oz) of butterbr - 90 g (3.