Deutsch: Blanchieren / Español: Escaldar / Português: Branquear / Français: Blanchir / Italiano: Sbollentare

Blanch is a cooking technique involving briefly boiling food and then quickly cooling it in ice water. This method is commonly used for vegetables, fruits, and nuts to achieve various culinary purposes.


Blanching is a two-step process that begins with plunging food items into boiling water for a short duration, typically ranging from a few seconds to a few minutes. The exact time depends on the type and size of the food being blanched. Immediately after boiling, the food is rapidly transferred to an ice water bath to halt the cooking process. This sudden temperature change helps in preserving the colour, texture, and nutritional value of the food.

Blanching is used for several reasons:

  1. Preservation of Colour and Texture: It helps maintain the vibrant colours and crisp texture of vegetables.
  2. Preparation for Freezing: Blanching inactivates enzymes that can cause spoilage, making it an essential step before freezing vegetables.
  3. Peeling: For certain fruits and vegetables, blanching loosens the skin, making it easier to peel.
  4. Reduction of Strong Flavours: Blanching can mellow out strong or bitter flavours in certain vegetables.
  5. Sanitization: It reduces the presence of surface microorganisms, enhancing food safety.


Blanching is also a critical step in the production of parboiled rice, where the rice is partially boiled in the husk. This process enhances the nutritional profile and alters the texture of the rice, making it more robust during cooking.

Application Areas

  1. Home Cooking: Blanching is a common technique in home kitchens for preparing vegetables, peeling tomatoes, and prepping ingredients for recipes.
  2. Food Preservation: It is widely used in food preservation, particularly for preparing vegetables for freezing.
  3. Culinary Arts: Professional chefs use blanching to enhance the appearance and texture of dishes, as well as to prepare ingredients for more complex recipes.
  4. Food Industry: In the food processing industry, blanching is used to prepare vegetables and fruits for canning, freezing, and drying.

Well-Known Examples

  • Blanched Almonds: Almonds that have been blanched to remove their skins.
  • Tomato Peeling: Blanching tomatoes to easily peel off their skins for sauces and soups.
  • Vegetable Preparation: Blanching green beans, broccoli, or asparagus to retain their bright colour and crispness before serving or further cooking.

Treatment and Risks

While blanching is generally a straightforward and beneficial technique, there are some considerations to keep in mind. Over-blanching can lead to nutrient loss and a mushy texture, while under-blanching might not effectively inactivate enzymes, leading to poor preservation results. Ensuring the correct blanching time and promptly cooling in ice water is essential for optimal results.

Similar Terms

  • Boiling: Cooking food in water at its boiling point.
  • Parboiling: Partially boiling food as an initial step in the cooking process.
  • Steaming: Cooking food using steam, often considered a gentler alternative to boiling.
  • Shocking: Another term for the cooling phase in blanching, where food is rapidly cooled in ice water.


Blanching is a versatile and essential cooking technique used to preserve the colour, texture, and nutritional value of food. By briefly boiling and then rapidly cooling vegetables, fruits, and nuts, blanching prepares them for freezing, enhances their appearance, makes peeling easier, and reduces strong flavours. This method is widely used in home kitchens, professional culinary arts, and the food industry, playing a crucial role in food preparation and preservation.


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