Science of Cooking: Ask the Inquisitive Cooks! (2024)

Science of Cooking: Ask the Inquisitive Cooks! (1)

" What is the difference between a pressure cooker and a slow cooker? "

Hello. Please tell me the difference between a pressure cooker and a slow cooker. Which one I should use to cook very tough meat? Thank you.

—Lesley Just, Dar es Salaam, Tanzania

Still have more questions? You'll find more answers in our archived monthly feature articles by the Inquisitive Cooks.

( Meet the Inquisitive Cooks )

Hi Lesley,

Both slow cookers and pressure cookers do a good job of tenderizing tough meat, but each makes meat more edible in a different way.

A pressure cooker is an enclosed pot with a lid that locks to form an airtight seal. When a small amount of liquid inside the pot boils and produces steam, the pressure cooker traps the steam inside. As pressure builds, water boils at higher and higher temperatures. At 5 pounds pressure, water boils at about 228 °F (108 °C). At 15 pounds pressure, the boiling temperature rises to 250 °F (121 °C). When you consider that water usually boils at 212 °F (100 °C) and the food inside a pressure cooker is at much hotter temperatures than normal simmering will allow, it's not surprising that food cooks quickly.

Science of Cooking: Ask the Inquisitive Cooks! (2)

There's another aspect of pressure cookers to consider too. Steam penetrates food easily under pressure. So connective tissues in cubes of beef for soups or stews soften in 15 minutes or less, and a pot roast will be medium-rare in 30 minutes.

Be sure to follow instructions carefully; at this speed, it's easy to overcook things in mere minutes. You may find that flavors aren't as fully developed as when tough meat simmers in a slow braise But you do save a lot of time.

A slow cooker is a countertop appliance—basically an electrified pot with a lid that's designed to cook at low temperatures for long periods of time. Though very different from a pressure cooker, slow cookers are also good for tough cuts of meat. It's best to begin on the highest setting for the first hour of cooking (to raise the temperature quickly) and then reduce the setting to low. Slow cookers work well for soups and stews where less-tender cuts of meat are cut into chunks or small pieces. They are not appropriate for large pieces of meat such as roasts, as the heat penetrates too slowly to ensure safety.

So how does slow cooking tenderize? Broth, water, or juices are always added along with the meat. The moist heat they provide softens the connective tissue that binds the muscle fibers in the meat, helping it to fall apart more easily. And when the heat is kept low, as it is in slow cooking, the proteins in the muscle are less likely to overcook, so the meat stays moist as well as tender. Flavors are also more developed, but the process takes considerable time.

If you have a pressure cooker and a slow cooker, we encourage you to try both. We'd be interested in your results and comments, as would many members of our Forums.

Anne and Sue

Science of Cooking: Ask the Inquisitive Cooks! (3) Science of Cooking: Ask the Inquisitive Cooks! (4) Science of Cooking: Ask the Inquisitive Cooks! (5)
Science of Cooking: Ask the Inquisitive Cooks! (2024)

FAQs

What is the basic science behind cooking? ›

The role of heat, acid, and enzymes in cooking

Heat and enzymes: Heat breaks down enzymes such as proteins. This is called denaturing, and it's why egg whites turn solid and white when you cook them. Without this reaction, many foods wouldn't have their distinctive "bite" when you eat them.

What are the scientific principles of cooking? ›

​​Exploring the Science of Cooking: How Heat Affects Food
  • Maillard Reaction: The Browning Magic. ...
  • Protein Denaturation: Changing Structures. ...
  • Gelatinization: The Science of Starch. ...
  • Caramelization: Sugars at Work. ...
  • Cooking Oil and Heat Transfer.
Oct 6, 2023

What is scientific about cooking? ›

Science is an important and constant element in the culinary process. Foods are scaled proportionately, and combined in a certain order, to achieve desired outcomes. Chemical reactions occur in cooking through manipulation or emulsification. The control of heat and cold maximizes food quality and safety.

Is gastronomy a science or an art? ›

Gastronomy is both an art and a science which brings together a variety of ingredients to create mouth-watering dishes based on culture and cooking styles in a particular country.

What is the main principle of cooking? ›

Principles of Cooking. Cooking is defined as the transfer of energy from a heat source to food. This energy alters food's molecular structure. Changing the taste, aroma and appearance of food.

What is the first principle of cooking? ›

It's a way of thinking, an ability to see that everything you do from the moment you step into the kitchen to the last dish you dry is part of a single, simple process. You realize that the “perfect” way to prepare any dish is whatever happens to work with you and your meal.

What is the science of cooking called? ›

Molecular gastronomy, or progressive cuisine, is a movement that incorporates science and new techniques in the preparation, transformation and artistic presentation of food. It is the study of molecules as they relate to the chemical and physical processes of cooking.

What is the chemistry behind cooking? ›

Any cooking you do involves chemistry. The use of heat, cold, and cutting changes the composition of foods. Even simply slicing an apple sets off chemical reactions that change the color of the apple's flesh. If you heat up sugar to turn it into syrup, you're using a chemical reaction.

What are the six basic principles of food science? ›

For the most time it is important to know how your food will react in certain situations and cooking conditions. The six basic principles will surely help you with that! They are as follows: Caramelization, Coagulation, Denaturation, Emulsification, Gelatinization and the Maillard reaction.

What are the physics concepts of cooking? ›

The basic physics principles behind cooking can be phase transformations, Thermal conductivity, specific heat and thermal diffusivity. The phase can be considered as a physically separable portion of matter or a region of matter where unique properties exist.

Is cooking a science or math? ›

While cooks and chefs don't need science or math degrees, they do need a working knowledge of the principles of numbers, chemistry, and biology.

What science says about food? ›

Research consistently shows that when you eat mostly plant foods, markers of health improve. Benefits include lower blood pressure, triglyceride levels, glucose and waist circumference, which can translate to a lower risk of a number of different diseases, including heart disease and diabetes.

Is cooking a skill or an art? ›

Both. It is a skill then you learn to take that skill to an art form. Cooking can be seen as both an art and a skill, depending on how it's approached and practiced. As an art, cooking involves creativity, intuition, and expression.

Is baking an exact science? ›

The process of baking also involves studying the structure and behaviour of the physical… in the form of ingredients, by watching (or choosing), measuring, doing experiments with these ingredients, and then developing theories, aka methods and recipes. This is how every baked good originates!

What is the science behind food science? ›

What is Food Science? Food science draws from many disciplines, including biology, chemical engineering, and biochemistry to better understand food processes and improve food products for the general public. As the stewards of the field, food scientists study the physical, microbial, and chemical makeup of food.

What are the basic principles of food science? ›

For the most time it is important to know how your food will react in certain situations and cooking conditions. The six basic principles will surely help you with that! They are as follows: Caramelization, Coagulation, Denaturation, Emulsification, Gelatinization and the Maillard reaction.

How does physics apply to cooking? ›

The product of time, temperature and nature of medium used for cooking can decide the quality of food. Understanding the concept of thermal conductivity, specific heat and thermal diffusivity can lead to optimized time of cooking.

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