How long does it take to make Fumet, or fish stock?

Fumet, which is a type of fish stock, is traditionally prepared by simmering fish bones and trimmings along with aromatic vegetables, such as onions, leeks, or celery, and sometimes white wine or herbs. The cooking process generally lasts around 45 minutes. This timeframe allows the flavors to develop appropriately without overcooking the fish components, which could lead to bitterness and cloudiness in the stock.

The goal is to extract the flavors while maintaining a clean and delicate profile, which is essential for dishes that will use fumet as a base, such as sauces or soups. While some stocks may require longer cooking times to extract flavors and gelatin from harder ingredients like beef bones, fish stock is more delicate and benefits from a shorter simmering period. This careful balance is why 45 minutes is considered the optimal time for making fumet, ensuring the stock retains its clarity and refined taste.