State Why is necessary to defrost foods before cooking?

It's not always necessary to defrost foods before cooking, but it's often recommended for several reasons:

1. Better Cooking Results:

* Even Cooking: Frozen food cooks unevenly because the ice crystals prevent heat penetration. Defrosting allows for more even cooking, resulting in a better-cooked product.

* Texture: Many foods, especially meats, become tough and rubbery when cooked from frozen. Defrosting helps preserve a tender texture.

* Flavor: Defrosting allows the flavors of the food to develop more fully during cooking.

2. Food Safety:

* Bacteria Growth: Frozen food is generally safe because the low temperatures inhibit bacterial growth. However, defrosting at room temperature creates a "danger zone" (between 40°F and 140°F) where bacteria multiply rapidly. This can lead to foodborne illness.

* Uneven Heating: When cooking frozen food, the outside may be cooked while the inside remains frozen. This can create unsafe conditions where bacteria can survive.

Exceptions:

* Some recipes specifically call for cooking from frozen. For example, some frozen vegetables are designed to be cooked directly from the freezer.

* Certain foods benefit from being cooked frozen. For instance, some meats, like chicken breasts, can be cooked directly from frozen using a method like sous vide, which ensures even cooking.

Safe Defrosting Methods:

* Refrigerator: This is the safest and most recommended method. It takes time, but it ensures even thawing and prevents bacterial growth.

* Cold Water: Submerging frozen food in cold water is a faster method, but it's important to change the water every 30 minutes to maintain a safe temperature.

* Microwave: Some microwaves have defrost settings. This method can be quick, but it can also cook some parts of the food unevenly.

In conclusion: While not always essential, defrosting food before cooking generally leads to better cooking results and a safer food product. Choose the safest and most appropriate defrosting method for your situation.