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On Food and Cooking

On Food and Cooking

The Science and Lore of the Kitchen
by Harold McGee 2007 908 pages
4.46
15k+ ratings
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Key Takeaways

1. Fish and shellfish: Delicate creatures from water's underworld

The creatures that live in this cold, dark, dense, airless place are unmatched among our food animals in their variety and their strangeness.

Aquatic diversity. Fish and shellfish represent a vast array of species adapted to life in water, offering a unique culinary experience compared to land animals. From the depths of the oceans to freshwater lakes and rivers, these creatures have evolved distinct characteristics that make them both challenging and rewarding to prepare and consume.

Historical significance. For centuries, fish and shellfish have been crucial to human nutrition and economic development. Coastal communities worldwide have relied on seafood as a primary source of protein, while fishing industries have shaped the economies of many nations. The abundance of certain species, such as cod and herring, has played a pivotal role in historical events and the growth of maritime powers.

2. The decline of wild fish populations and the rise of aquaculture

With the help of faster and larger ships, sonar to see into the depths, miles-long nets and lines, and the mechanization of all aspects of the harvest, we've managed to fish many important food species to the verge of commercial extinction.

Overfishing crisis. The industrial-scale fishing practices of the 20th and 21st centuries have led to a severe depletion of wild fish stocks. Advanced technologies and increased demand have pushed many species to the brink of extinction, disrupting marine ecosystems and threatening the livelihoods of traditional fishing communities.

Aquaculture solution. In response to declining wild populations, aquaculture has emerged as a significant source of fish and shellfish. Fish farming offers several advantages:

  • Controlled environment for consistent quality
  • Year-round availability of seafood
  • Reduced pressure on wild stocks

However, aquaculture also presents challenges:

  • Potential environmental impacts (e.g., pollution, escape of farmed fish)
  • Concerns about the use of antibiotics and other chemicals
  • Debates over the nutritional quality of farmed vs. wild fish

3. Nutritional benefits and health risks of consuming seafood

There is indeed good evidence that fish oils can contribute significantly to our long-term health. On the other hand, of all our foods, fish and shellfish are the source of the broadest range of immediate health hazards, from bacteria and viruses to parasites, pollutants, and strange toxins.

Health benefits. Fish and shellfish are excellent sources of high-quality protein, essential vitamins, and minerals. The omega-3 fatty acids found in many fish species offer numerous health benefits, including:

  • Improved brain function and development
  • Reduced risk of heart disease
  • Anti-inflammatory properties

Potential risks. Despite their nutritional value, seafood consumption comes with certain risks:

  • Contamination with environmental pollutants (e.g., mercury, PCBs)
  • Presence of naturally occurring toxins in some species
  • Risk of foodborne illnesses from bacterial or viral contamination

To maximize benefits while minimizing risks, consumers should:

  • Choose a variety of seafood species
  • Be aware of local advisories regarding fish consumption
  • Properly handle and cook seafood to reduce the risk of foodborne illnesses

4. The unique biology of fish and its impact on culinary qualities

Fish owe their small, light bones, delicate connective tissue, and large, pale muscle masses to the fact that water is much denser than air.

Adaptation to aquatic life. The unique environment of water has shaped the biology of fish in ways that directly influence their culinary properties:

  • Buoyancy in water eliminates the need for heavy bones and tough connective tissue
  • Cold water temperatures necessitate special enzyme systems and fatty acid compositions

Culinary implications. These biological adaptations result in several distinctive qualities:

  • Delicate flesh that cooks quickly and is prone to overcooking
  • Highly unsaturated fats that provide health benefits but are prone to rapid spoilage
  • Enzyme systems that continue to work at refrigerator temperatures, leading to faster deterioration compared to land animals

Understanding these biological characteristics is crucial for properly handling and preparing fish to maintain their quality and maximize their culinary potential.

5. Recognizing and preserving the freshness of fish

So it's important to be able to recognize good-quality fish when we see it. But looks and smell can be deceiving.

Freshness indicators. Assessing the quality of fish requires attention to several factors:

  • Clear, bulging eyes
  • Bright, shiny skin with tight scales
  • Firm flesh that springs back when pressed
  • Mild, fresh ocean smell (not fishy or ammonia-like)

Proper storage. Maintaining the freshness of fish is critical for both safety and flavor:

  • Keep fish at temperatures close to freezing (32°F/0°C)
  • Use ice to maintain low temperatures during transport and storage
  • Minimize exposure to air by wrapping fish tightly
  • Use or freeze fish within 1-2 days of purchase for optimal quality

Understanding the signs of freshness and proper storage techniques allows consumers to enjoy fish at its best and reduces the risk of spoilage and foodborne illness.

6. The art of cooking fish: Gentle heat and close attention

The real challenge in cooking both fish and meat is to get the texture right. And the key to fish and meat texture is the transformation of muscle proteins.

Protein transformation. The delicate nature of fish proteins requires careful cooking to achieve the desired texture:

  • Fish proteins begin to coagulate at lower temperatures than land animal proteins
  • Overcooking leads to dry, tough fish as proteins squeeze out moisture

Cooking techniques. To achieve optimal results:

  • Use gentle, controlled heat to cook fish evenly
  • Monitor internal temperature closely (130-140°F/55-60°C for most fish)
  • Allow for carryover cooking after removing fish from heat source
  • Adjust cooking times based on thickness and type of fish

Mastering the art of cooking fish involves understanding the science behind protein transformation and developing a sense for the subtle changes that occur during the cooking process.

7. Diverse cooking methods for fish and shellfish

The many methods for heating meats and fish are described in detail in the previous chapter, pp. 156–65. Briefly, "dry" heating methods — grilling, frying, baking — produce surface temperatures high enough to produce the colors and flavors of the browning reactions, while "moist" techniques — steaming, poaching — fail to trigger browning, but heat foods more rapidly and can supply flavors from other ingredients.

Dry heat methods:

  • Grilling: Imparts smoky flavor and crisp texture
  • Baking: Allows for even cooking and flavor infusion
  • Frying: Creates crispy exteriors while maintaining moist interiors

Moist heat methods:

  • Poaching: Gently cooks fish in flavorful liquid
  • Steaming: Preserves delicate textures and natural flavors
  • Braising: Combines browning with moist cooking for rich flavors

Choosing a method. Factors to consider when selecting a cooking technique:

  • Type and thickness of fish
  • Desired final texture and flavor profile
  • Available equipment and ingredients

Experimenting with different cooking methods allows cooks to discover the best approach for each type of fish and personal preference.

8. Raw fish preparations: A primal freshness experience

People in many parts of the world enjoy eating ocean fish and shellfish raw. Unlike meats, fish have the advantage of relatively tender muscle and a naturally savory taste, and are easier and more interesting to eat raw.

Raw fish traditions. Various cultures have developed unique raw fish preparations:

  • Japanese sushi and sashimi
  • Latin American ceviche
  • Hawaiian poke

Safety considerations. Consuming raw fish carries certain risks:

  • Parasitic infections
  • Bacterial contamination
  • Accumulation of environmental toxins

To minimize these risks:

  • Use only high-quality, fresh fish from reputable sources
  • Freeze fish intended for raw consumption to kill parasites
  • Practice proper hygiene and food handling techniques

Raw fish preparations offer a unique culinary experience, showcasing the pure flavors and textures of seafood. However, it's crucial to balance this experience with an understanding of the potential risks and necessary precautions.

Last updated:

Review Summary

4.46 out of 5
Average of 15k+ ratings from Goodreads and Amazon.

On Food and Cooking is highly praised for its comprehensive, scientific approach to food and cooking. Readers appreciate its encyclopedic nature, covering topics from ingredients to techniques. Many find it fascinating and informative, noting its ability to explain the "why" behind cooking processes. While some find it dense or textbook-like, most reviewers consider it an invaluable resource for understanding food science. The book is often described as engaging, well-researched, and a must-have for food enthusiasts and professionals alike.

Your rating:

About the Author

Harold James McGee is a renowned American author specializing in food science and culinary history. His seminal work, "On Food and Cooking: The Science and Lore of the Kitchen," first published in 1984 and revised in 2004, has become a cornerstone in food science education. As a visiting scholar at Harvard University, McGee's scientific approach to cooking has garnered widespread acclaim and influenced numerous chefs and food writers. His work has won multiple awards and is extensively used in university food science courses. McGee's ability to explain complex culinary concepts has made him a respected figure in both academic and professional culinary circles.

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